Re: PowerMac G3 AIO 'snapping/popping'
On Nov 9, 2010, at 10:31 PM, Richard Gerome wrote: Also Chuck, He never stated it was coming from the monitor??? He said it was coming from under the hood... Where and what is the hood here??? The only thing that I thought he was talking about was the panel on the tower??? The only thing that I know of that has a hood is a car... Oh yeah the ones from Europe call it the Bonnet... This is why I thought it could have been the HD... The main issue is less than you blamed the hard drive but that you did so from a position of utter ignorance of the system involved. You heard 'G3' and leapt to a conclusion based on your experience with a completely DIFFERENT system. To continue the car analogy, it's like you jumping into a discussion of a VW Jetta TDI running raggedly, and stating that replacing the spark plugs and switching to premium gas would likely fix it. -- Bruce Johnson University of Arizona College of Pharmacy Information Technology Group Institutions do not have opinions, merely customs -- You received this message because you are a member of G-Group, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to g3-5-list@googlegroups.com For more options, visit this group at http://groups.google.com/group/g3-5-list
Re: PowerMac G3 AIO 'snapping/popping'
It most certainly sounds to me like it's the Hard Drive going bad... I've had, out of all the Apples I have owned and worked on only 2 Clamshells do this (one of them I bought brand new and Apple Care replaced it) and in both the HD was the issue... My Apple use goes back to 1996... -Original Message- From: lrbarrios lrbarr...@datastarusa.com Sent: Nov 9, 2010 2:10 AM To: G-Group g3-5-list@googlegroups.com Subject: PowerMac G3 AIO 'snapping/popping' I just purchased a PowerMac G3 All-In-One from a flee market for $5. I was told that it works, so what the heck. As long as my wife doesn't find out, I'm okay. :) I powered it up tonight and it's making a 'snapping/popping' sound from under the hood -- like a bug zapper. When this happens, the CRT display also flashes. At first I just thought it might be dust. I can actually boot an OS 9.2 CD, but shortly afterwards, the machine will start snapping and popping and reboot itself. Eventually, after it gets warmed up, it's almost continually popping and interrupting the boot process. I know this can't be good for it, so I've turned it off until I can get some answers. Is it the power supply? -- You received this message because you are a member of G-Group, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to g3-5-list@googlegroups.com For more options, visit this group at http://groups.google.com/group/g3-5-list Scars only tell us where we have been, they do not have to dictate where we are going... -- You received this message because you are a member of G-Group, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to g3-5-list@googlegroups.com For more options, visit this group at http://groups.google.com/group/g3-5-list
Re: PowerMac G3 AIO 'snapping/popping'
You might want to unplug it as well. If it is not the power supply, it is something else with a lot of juice running through it. You have a potential fire hazard. lrbarrios wrote: I just purchased a PowerMac G3 All-In-One from a flee market for $5. I was told that it works, so what the heck. As long as my wife doesn't find out, I'm okay. :) I powered it up tonight and it's making a 'snapping/popping' sound from under the hood -- like a bug zapper. When this happens, the CRT display also flashes. At first I just thought it might be dust. I can actually boot an OS 9.2 CD, but shortly afterwards, the machine will start snapping and popping and reboot itself. Eventually, after it gets warmed up, it's almost continually popping and interrupting the boot process. I know this can't be good for it, so I've turned it off until I can get some answers. Is it the power supply? -- You received this message because you are a member of G-Group, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to g3-5-list@googlegroups.com For more options, visit this group at http://groups.google.com/group/g3-5-list
Re: PowerMac G3 AIO 'snapping/popping'
anyone who points to a hard drive about this issue should not be allowed to own or operate a computer. On 11/9/10, Richard Gerome onecoolka...@earthlink.net wrote: It most certainly sounds to me like it's the Hard Drive going bad... I've had, out of all the Apples I have owned and worked on only 2 Clamshells do this (one of them I bought brand new and Apple Care replaced it) and in both the HD was the issue... My Apple use goes back to 1996... -Original Message- From: lrbarrios lrbarr...@datastarusa.com Sent: Nov 9, 2010 2:10 AM To: G-Group g3-5-list@googlegroups.com Subject: PowerMac G3 AIO 'snapping/popping' I just purchased a PowerMac G3 All-In-One from a flee market for $5. I was told that it works, so what the heck. As long as my wife doesn't find out, I'm okay. :) I powered it up tonight and it's making a 'snapping/popping' sound from under the hood -- like a bug zapper. When this happens, the CRT display also flashes. At first I just thought it might be dust. I can actually boot an OS 9.2 CD, but shortly afterwards, the machine will start snapping and popping and reboot itself. Eventually, after it gets warmed up, it's almost continually popping and interrupting the boot process. I know this can't be good for it, so I've turned it off until I can get some answers. Is it the power supply? -- You received this message because you are a member of G-Group, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to g3-5-list@googlegroups.com For more options, visit this group at http://groups.google.com/group/g3-5-list Scars only tell us where we have been, they do not have to dictate where we are going... -- You received this message because you are a member of G-Group, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to g3-5-list@googlegroups.com For more options, visit this group at http://groups.google.com/group/g3-5-list -- You received this message because you are a member of G-Group, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to g3-5-list@googlegroups.com For more options, visit this group at http://groups.google.com/group/g3-5-list
Re: PowerMac G3 AIO 'snapping/popping'
Sent from my iPad On Nov 8, 2010, at 11:10 PM, lrbarrios lrbarr...@datastarusa.com wrote: I just purchased a PowerMac G3 All-In-One from a flee market for $5. I was told that it works, so what the heck. As long as my wife doesn't find out, I'm okay. :) I powered it up tonight and it's making a 'snapping/popping' sound from under the hood -- like a bug zapper. When this happens, the CRT display also flashes. At first I just thought it might be dust. I can actually boot an OS 9.2 CD, but shortly afterwards, the machine will start snapping and popping and reboot itself. Eventually, after it gets warmed up, it's almost continually popping and interrupting the boot process. I know this can't be good for it, so I've turned it off until I can get some answers. Is it the power supply? Nope, it's the sound (and soon to be the smell) of the flyback transformer's death throes. -- You received this message because you are a member of G-Group, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to g3-5-list@googlegroups.com For more options, visit this group at http://groups.google.com/group/g3-5-list
Re: PowerMac G3 AIO 'snapping/popping'
On Nov 9, 2010, at 2:27 AM, Richard Gerome wrote: It most certainly sounds to me like it's the Hard Drive going bad... I've had, out of all the Apples I have owned and worked on only 2 Clamshells do this (one of them I bought brand new and Apple Care replaced it) and in both the HD was the issue... My Apple use goes back to 1996... No it's the flyback transformer, a common issue in the AIO's especially at their age. -- Bruce Johnson University of Arizona College of Pharmacy Information Technology Group Institutions do not have opinions, merely customs -- You received this message because you are a member of G-Group, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to g3-5-list@googlegroups.com For more options, visit this group at http://groups.google.com/group/g3-5-list
Re: PowerMac G3 AIO 'snapping/popping'
On Nov 9, 2010, at 12:10 AM, Jim Scott wrote: Nope, it's the sound (and soon to be the smell) of the flyback transformer's death throes. Indeed so. The AIO needs a new analog board, which is essentially the heart and soul of the Trinitron monitor. Which is perhaps one reason NOT to get an AIO. -- You received this message because you are a member of G-Group, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to g3-5-list@googlegroups.com For more options, visit this group at http://groups.google.com/group/g3-5-list
Re: PowerMac G3 AIO 'snapping/popping'
On Nov 9, 2010, at 7:31 AM, Bruce Johnson wrote: No it's the flyback transformer, a common issue in the AIO's especially at their age. True enough, but tripler type flybacks are commonly enough available from the usual suspect TV and monitor repair parts dealers. -- You received this message because you are a member of G-Group, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to g3-5-list@googlegroups.com For more options, visit this group at http://groups.google.com/group/g3-5-list
Re: PowerMac G3 AIO 'snapping/popping'
On Nov 9, 2010, at 7:39 AM, Peter Haas wrote: On Nov 9, 2010, at 12:10 AM, Jim Scott wrote: Nope, it's the sound (and soon to be the smell) of the flyback transformer's death throes. Indeed so. The AIO needs a new analog board, which is essentially the heart and soul of the Trinitron monitor. Which is perhaps one reason NOT to get an AIO. It is possible to replace the flyback transformer. I've successfully replaced many that had begun exhibiting symptoms of death. I've also replaced a few in which not even a new flyback transformer could save the analog board, which had other damaged components. Google Bluestar International to find a new flyback. However, the real question is, Is it worth a gamble of $40 or so to try to save a Mac this old? Another reason NOT to get an AIO is that the beasts weigh 60 pounds. Apple was nice enough to build in two hand grips so you could lug one around. But after following all the ergonomically correct lifting procedures, and wearing a back brace, I still managed to wrench my back a couple of times lifting them. I'll never wrestle with an AIO again, thank goodness. (I now cringe every time I have to move an eMac, which weighs 50 pounds, doesn't have built-in hand grips, and has a slick plastic case. Boo!) But the best reason NOT to get an AIO, other than as a hobbyist's trip down memory lane, is that they are obsolete and not worth the effort. Video RAM begins at 2 MB and ends at 6 MB after an upgrade, for example. Try that on today's web sites. RIP, AIO. -- You received this message because you are a member of G-Group, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to g3-5-list@googlegroups.com For more options, visit this group at http://groups.google.com/group/g3-5-list
Re: PowerMac G3 AIO 'snapping/popping'
On 2010/11/09 10:11, Jim Scott so eloquently wrote: It is possible to replace the flyback transformer. I'm not familiar with a Power Mac AIO, is it similar to a G3 iMac? If so, isn't there a potentially large jolt of current waiting to shock someone if they don't discharge it first? Tina -- iMac 20 USB 2 1.25GHz G4 2GB RAM GeForce FX 5200 Ultra 64MB DDR Gnome/Ubuntu 10.10 Power Mac June 04 2GHz G5DP 8GB RAM GeForce 6800 Ultra DDL 256MB Leopard 10.5.8 PowerBook G4 15 HiRes DLSD 1.67GHz G4 2GB RAM Radeon 9700 128MB DDR Leopard 10.5.8 -- You received this message because you are a member of G-Group, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to g3-5-list@googlegroups.com For more options, visit this group at http://groups.google.com/group/g3-5-list
Re: PowerMac G3 AIO 'snapping/popping'
On Nov 9, 2010, at 9:24 AM, Tina K. wrote: On 2010/11/09 10:11, Jim Scott so eloquently wrote: It is possible to replace the flyback transformer. I'm not familiar with a Power Mac AIO, is it similar to a G3 iMac? If so, isn't there a potentially large jolt of current waiting to shock someone if they don't discharge it first? It's the Power Macintosh G3 All-In-One, and it is similar to the first-generation G3 iMac, except it has a bland beige case with a perforated white top that looks like a dental molar, hence the nickname G3 Molar. It also has a case of elephantiasis, compared to the 35-pound G3 iMac with similar specs. Go here to learn more (check out the 266 MHz version too): http://www.everymac.com/systems/apple/powermac_g3/stats/powermac_g3_233_aio.html. Yes, as with any cathode ray tube powered by a flyback transformer, safe CRT discharge practices should be observed. My point is that it is possible to replace just the FBT. I would assume that any prudent person who's a member of this list would be aware of the dangers of imprudently playing around with high-voltage devices. Jim -- You received this message because you are a member of G-Group, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to g3-5-list@googlegroups.com For more options, visit this group at http://groups.google.com/group/g3-5-list
Re: PowerMac G3 AIO 'snapping/popping'
On 2010/11/09 10:50, Jim Scott so eloquently wrote: It's the Power Macintosh G3 All-In-One, and it is similar to the first-generation G3 iMac, except it has a bland beige case with a perforated white top that looks like a dental molar, hence the nickname G3 Molar. It also has a case of elephantiasis, compared to the 35-pound G3 iMac with similar specs. Go here to learn more (check out the 266 MHz version too):http://www.everymac.com/systems/apple/powermac_g3/stats/powermac_g3_233_aio.html. Thank you for the link, I see that it was an Education only model which is probably why I am not familiar with it. Yes, as with any cathode ray tube powered by a flyback transformer, safe CRT discharge practices should be observed. My point is that it is possible to replace just the FBT. I would assume that any prudent person who's a member of this list would be aware of the dangers of imprudently playing around with high-voltage devices. I agree, but better safe then sorry. Especially since LCDs have almost completely replaced CRTs there may be some that have forgotten about the risk, or have never opened a CRT before. Tina -- iMac 20 USB 2 1.25GHz G4 2GB RAM GeForce FX 5200 Ultra 64MB DDR Gnome/Ubuntu 10.10 Power Mac June 04 2GHz G5DP 8GB RAM GeForce 6800 Ultra DDL 256MB Leopard 10.5.8 PowerBook G4 15 HiRes DLSD 1.67GHz G4 2GB RAM Radeon 9700 128MB DDR Leopard 10.5.8 -- You received this message because you are a member of G-Group, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to g3-5-list@googlegroups.com For more options, visit this group at http://groups.google.com/group/g3-5-list
Re: PowerMac G3 AIO 'snapping/popping'
flyback transformers are dangerous as hell. a layman can learn to repair apple computers easily, as far as replacing parts. as long as you know what to replace. CRT monitor components are an exception. this repair has more in common with TV repair, and involves handling possible high voltage discharges (tens of thousands) that can still get you after the unit has been powered down and unplugged for months ( capacitors hold a charge ). a TV tech can handle it safely. if you don't know what you're doing you can be hurt bad. i assume people have rarely been killed. the CRT related parts of an apple computer are typically not manufacturer rated for untrained techs to work on.. when it's an all-in-one,( including 9 monochrome screen units, the G3 iMac, the beige AIO, the 5xxx types and the eMac) the flyback transformer is often the issue, and unsafe to handle without some knowledge. in my opinion this is a fool's errand because of the safety issues. screw around with PCI cards or drives. they will get broken or fried, but the owner won't be harmed. if you know how to do it there is a procedure for draining power stored in the caps. not a safe procedure for a tinkerer making guesses. On Tue, Nov 9, 2010 at 2:10 AM, lrbarrios lrbarr...@datastarusa.com wrote: I just purchased a PowerMac G3 All-In-One from a flee market for $5. I was told that it works, so what the heck. As long as my wife doesn't find out, I'm okay. :) I powered it up tonight and it's making a 'snapping/popping' sound from under the hood -- like a bug zapper. When this happens, the CRT display also flashes. At first I just thought it might be dust. I can actually boot an OS 9.2 CD, but shortly afterwards, the machine will start snapping and popping and reboot itself. Eventually, after it gets warmed up, it's almost continually popping and interrupting the boot process. I know this can't be good for it, so I've turned it off until I can get some answers. Is it the power supply? -- You received this message because you are a member of G-Group, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to g3-5-list@googlegroups.com For more options, visit this group at http://groups.google.com/group/g3-5-list -- You received this message because you are a member of G-Group, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to g3-5-list@googlegroups.com For more options, visit this group at http://groups.google.com/group/g3-5-list
RE: PowerMac G3 AIO 'snapping/popping'
Yes, people have been killed screwing around with flybacks. You are looking at the potential discharge of tens of thousands of volts if you touch certain things together. At the least you are looking at the worst case of flash blindness you could never imagine. Unless you are skilled in CRT repair, LEAVE IT ALONE! From: g3-5-list@googlegroups.com [mailto:g3-5-l...@googlegroups.com] On Behalf Of Chuck Sent: Tuesday, November 09, 2010 1:20 PM To: g3-5-list@googlegroups.com Subject: Re: PowerMac G3 AIO 'snapping/popping' flyback transformers are dangerous as hell. a layman can learn to repair apple computers easily, as far as replacing parts. as long as you know what to replace. CRT monitor components are an exception. this repair has more in common with TV repair, and involves handling possible high voltage discharges (tens of thousands) that can still get you after the unit has been powered down and unplugged for months ( capacitors hold a charge ). a TV tech can handle it safely. if you don't know what you're doing you can be hurt bad. i assume people have rarely been killed. the CRT related parts of an apple computer are typically not manufacturer rated for untrained techs to work on.. when it's an all-in-one,( including 9 monochrome screen units, the G3 iMac, the beige AIO, the 5xxx types and the eMac) the flyback transformer is often the issue, and unsafe to handle without some knowledge. in my opinion this is a fool's errand because of the safety issues. screw around with PCI cards or drives. they will get broken or fried, but the owner won't be harmed. if you know how to do it there is a procedure for draining power stored in the caps. not a safe procedure for a tinkerer making guesses. On Tue, Nov 9, 2010 at 2:10 AM, lrbarrios lrbarr...@datastarusa.com wrote: I just purchased a PowerMac G3 All-In-One from a flee market for $5. I was told that it works, so what the heck. As long as my wife doesn't find out, I'm okay. :) I powered it up tonight and it's making a 'snapping/popping' sound from under the hood -- like a bug zapper. When this happens, the CRT display also flashes. At first I just thought it might be dust. I can actually boot an OS 9.2 CD, but shortly afterwards, the machine will start snapping and popping and reboot itself. Eventually, after it gets warmed up, it's almost continually popping and interrupting the boot process. I know this can't be good for it, so I've turned it off until I can get some answers. Is it the power supply? -- You received this message because you are a member of G-Group, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to g3-5-list@googlegroups.com For more options, visit this group at http://groups.google.com/group/g3-5-list -- You received this message because you are a member of G-Group, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to g3-5-list@googlegroups.com For more options, visit this group at http://groups.google.com/group/g3-5-list -- You received this message because you are a member of G-Group, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to g3-5-list@googlegroups.com For more options, visit this group at http://groups.google.com/group/g3-5-list
Re: PowerMac G3 AIO 'snapping/popping'
On 11/9/2010 1:10 AM, lrbarrios wrote: I just purchased a PowerMac G3 All-In-One from a flee market for $5. I was told that it works, so what the heck. As long as my wife doesn't find out, I'm okay. :) I powered it up tonight and it's making a 'snapping/popping' sound from under the hood -- like a bug zapper. When this happens, the CRT display also flashes. At first I just thought it might be dust. I can actually boot an OS 9.2 CD, but shortly afterwards, the machine will start snapping and popping and reboot itself. Eventually, after it gets warmed up, it's almost continually popping and interrupting the boot process. I know this can't be good for it, so I've turned it off until I can get some answers. Is it the power supply? I have experienced this phenomenon when the flyback transformer is going. Some others will be able to give better insight on the internal makeup of this model and what part you may need. -- You received this message because you are a member of G-Group, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to g3-5-list@googlegroups.com For more options, visit this group at http://groups.google.com/group/g3-5-list
Re: PowerMac G3 AIO 'snapping/popping'
On Nov 9, 2010, at 1:51 PM, Chuck wrote: you''ll get knocked across the room and a 20,000kV+ shock will pass through your heart. when you try to monkey around with this. Its generally about 25 kV, but it is very seldom through one's heart. All modern flybacks are of the bleeder type, and the potential which is stored across the aquadag of the CRT is very promptly dissipated by the bleeder within the flyback. However, ANY repairs on a CRT's analog board must, necessarily, be effected by well-trained personnel. -- You received this message because you are a member of G-Group, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to g3-5-list@googlegroups.com For more options, visit this group at http://groups.google.com/group/g3-5-list
Re: PowerMac G3 AIO 'snapping/popping'
At 15:35 -0800 11/9/10, Peter Haas wrote: However, ANY repairs on a CRT's analog board must, necessarily, be effected by well-trained personnel. Remembering that good advice. . . It's possible, given the really possibility of bad storage by the previous owner, that you might luck out and need only to clean the wire that runs from the flyback to the picture tube. A layer of partially conductive crud on the high voltage insulators or on the back surface of the tube can make the intermittent sparks you report. You DO need to discharge the tube though.. Unplugged from the wall for a week should do it. Personally I use a long metallic probe with a ground lead to the spring that usually grounds the carbon coating, aquadag, on the tube to the metal of the computer box. I made the tool from an old long screwdriver with a plastic handle and a clip lead. The procedure is to slide the grounded tool under the rubber cap that covers the connection to the tube in a way that makes contact with the center wire. If you're the slightest bit uncomfortable with that go for two weeks to get things discharged or find a friend who has done it. (I'm probably biased a bit. I did my thesis with a 200,000 volt accelerator.) Cleaning with some dry alcohol or even soap and water with a good rinse is pretty easy. Let it dry well and test. You might luck out. If not, it is the flyback, or possibly a cracked tube, and not worth fixing. -- -- If it's not on fire it's a software problem. -- -- You received this message because you are a member of G-Group, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to g3-5-list@googlegroups.com For more options, visit this group at http://groups.google.com/group/g3-5-list
Re: PowerMac G3 AIO 'snapping/popping'
Hey Chuck, That wasn't fair to say that... I guess you do not know anything about the Clamshells HD's back in the day??? That is exactly how they sounded when a HD was going bad... They mentioned a G3 which is from that era... So I just figured that maybe the 3.5 drives may have done the same thing... There was talk about this issue in some older posts a couple yrs ago... We are all here to help each other not criticize each other... Many more of the other posts referred them what is going bad... I didn't say it was for sure the HD, I just said it sounded to me like a bad HD... So please don't waste an email on these type of comments here... Thank You!!! -Original Message- From: Chuck deadke...@gmail.com Sent: Nov 9, 2010 10:06 AM To: g3-5-list@googlegroups.com Subject: Re: PowerMac G3 AIO 'snapping/popping' anyone who points to a hard drive about this issue should not be allowed to own or operate a computer. On 11/9/10, Richard Gerome onecoolka...@earthlink.net wrote: It most certainly sounds to me like it's the Hard Drive going bad... I've had, out of all the Apples I have owned and worked on only 2 Clamshells do this (one of them I bought brand new and Apple Care replaced it) and in both the HD was the issue... My Apple use goes back to 1996... -Original Message- From: lrbarrios lrbarr...@datastarusa.com Sent: Nov 9, 2010 2:10 AM To: G-Group g3-5-list@googlegroups.com Subject: PowerMac G3 AIO 'snapping/popping' I just purchased a PowerMac G3 All-In-One from a flee market for $5. I was told that it works, so what the heck. As long as my wife doesn't find out, I'm okay. :) I powered it up tonight and it's making a 'snapping/popping' sound from under the hood -- like a bug zapper. When this happens, the CRT display also flashes. At first I just thought it might be dust. I can actually boot an OS 9.2 CD, but shortly afterwards, the machine will start snapping and popping and reboot itself. Eventually, after it gets warmed up, it's almost continually popping and interrupting the boot process. I know this can't be good for it, so I've turned it off until I can get some answers. Is it the power supply? -- -- Scars only tell us where we have been, they do not have to dictate where we are going... -- You received this message because you are a member of G-Group, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to g3-5-list@googlegroups.com For more options, visit this group at http://groups.google.com/group/g3-5-list
Re: PowerMac G3 AIO 'snapping/popping'
Tina K. wrote: On 2010/11/09 10:11, Jim Scott so eloquently wrote: It is possible to replace the flyback transformer. I'm not familiar with a Power Mac AIO, is it similar to a G3 iMac? If so, isn't there a potentially large jolt of current waiting to shock someone if they don't discharge it first? In the case of a flyback transformer, it's more voltage than current. But it only takes about 15ma to stop a Human heart. 20,000 to 30,000 volts (depending in the design of the equipment) is certainly more than enough to push 15ma through a Human skin. Not to put anyone down, or insult anyone's intelligence, BUT!!! If a person is not able to recognize a flyback problem on their own, they probably don't have the electronics training or experience to be tinkering around with a CRT or flyback transformer. $5.00 wasted is hardly worth mentioning. But $5,000.00 (minimum) for a funeral + the loss of a loved one is not worth any computer, no matter how Classic it may be. Cheers, Drew -- You received this message because you are a member of G-Group, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to g3-5-list@googlegroups.com For more options, visit this group at http://groups.google.com/group/g3-5-list
Re: PowerMac G3 AIO 'snapping/popping'
I'm not familiar with that computer either just like Tina stated here and she has offered a lot of insight here too... But if there is that kind of energy stored in there I'm sure Apple put a Warning Label on it so no one would get zapped??? I hope??? Or there would have been some Law Suits for sure if someone died... Also before I ever tare something apart I will always look for a manual somewhere to see how it's done... I know a lot about capacitors, condensers, coils you name it all sorts of voltage devises that will store, increase or reduce voltage in a lot electronic devises... Went to Engineering School and learned about it there and also went to Automotive School and learned about it too, AC and DC and I'm not talking about that band either (which I think they suck)... -Original Message- From: Chuck deadke...@gmail.com Sent: Nov 9, 2010 4:51 PM To: g3-5-list@googlegroups.com Subject: Re: PowerMac G3 AIO 'snapping/popping' someone wrote: I would assume that any prudent person who's a member of this list would be aware of the dangers of imprudently playing around with high-voltage devices. that's a very bad assumption. possibly causing a human to die. show me a thousand list member mac tinkerers,and i will show you about five hundred who are utterly unaware there is an issue, and about three to five people who can handle it correctly. at least half of people who earn a living fixing macs cannot handle this issue safely, and don't try. go ahead and spout condescending, irrational and dismissive baloney. you''ll get knocked across the room and a 20,000kV+ shock will pass through your heart. when you try to monkey around with this. good luck with that plan. i approve. natural selection is a good thing. condescension of that type was not allowed to survive in the human gene pool 40,000 years ago and there's no need for it to survive now. ~~ On 11/9/10, Tina K. penguir...@gmail.com wrote: On 2010/11/09 10:50, Jim Scott so eloquently wrote: It's the Power Macintosh G3 All-In-One, and it is similar to the first-generation G3 iMac, except it has a bland beige case with a perforated white top that looks like a dental molar, hence the nickname G3 Molar. It also has a case of elephantiasis, compared to the 35-pound G3 iMac with similar specs. Go here to learn more (check out the 266 MHz version too):http://www.everymac.com/systems/apple/powermac_g3/stats/powermac_g3_233_aio.html. Thank you for the link, I see that it was an Education only model which is probably why I am not familiar with it. Yes, as with any cathode ray tube powered by a flyback transformer, safe CRT discharge practices should be observed. My point is that it is possible to replace just the FBT. I would assume that any prudent person who's a member of this list would be aware of the dangers of imprudently playing around with high-voltage devices. I agree, but better safe then sorry. Especially since LCDs have almost completely replaced CRTs there may be some that have forgotten about the risk, or have never opened a CRT before. Tina -- iMac 20 USB 2 1.25GHz G4 2GB RAM GeForce FX 5200 Ultra 64MB DDR Gnome/Ubuntu 10.10 Power Mac June 04 2GHz G5DP 8GB RAM GeForce 6800 Ultra DDL 256MB Leopard 10.5.8 PowerBook G4 15 HiRes DLSD 1.67GHz G4 2GB RAM Radeon 9700 128MB DDR Leopard 10.5.8 -- You received this message because you are a member of G-Group, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to g3-5-list@googlegroups.com For more options, visit this group at http://groups.google.com/group/g3-5-list -- You received this message because you are a member of G-Group, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to g3-5-list@googlegroups.com For more options, visit this group at http://groups.google.com/group/g3-5-list Scars only tell us where we have been, they do not have to dictate where we are going... -- You received this message because you are a member of G-Group, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to g3-5-list@googlegroups.com For more options, visit this group at http://groups.google.com/group/g3-5-list
Re: PowerMac G3 AIO 'snapping/popping'
Also Chuck, He never stated it was coming from the monitor??? He said it was coming from under the hood... Where and what is the hood here??? The only thing that I thought he was talking about was the panel on the tower??? The only thing that I know of that has a hood is a car... Oh yeah the ones from Europe call it the Bonnet... This is why I thought it could have been the HD... -Original Message- From: lrbarrios lrbarr...@datastarusa.com Sent: Nov 9, 2010 2:10 AM To: G-Group g3-5-list@googlegroups.com Subject: PowerMac G3 AIO 'snapping/popping' I just purchased a PowerMac G3 All-In-One from a flee market for $5. I was told that it works, so what the heck. As long as my wife doesn't find out, I'm okay. :) I powered it up tonight and it's making a 'snapping/popping' sound from under the hood -- like a bug zapper. When this happens, the CRT display also flashes. At first I just thought it might be dust. I can actually boot an OS 9.2 CD, but shortly afterwards, the machine will start snapping and popping and reboot itself. Eventually, after it gets warmed up, it's almost continually popping and interrupting the boot process. I know this can't be good for it, so I've turned it off until I can get some answers. Is it the power supply? Scars only tell us where we have been, they do not have to dictate where we are going... -- You received this message because you are a member of G-Group, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to g3-5-list@googlegroups.com For more options, visit this group at http://groups.google.com/group/g3-5-list
