Re: G5 Repair - Next step?
Hello MJoeYoung, Thank you for the help and link for prospective parts. Here is what I did recently: replaced the PRAM, swapped the CPUs (A to B, and vs. a vs.) made sure the CPUs were well-seated. Of course, having to take apart the G5 (not as bad a project as I thought), that gave me a chance to reseat everything. I also inspected the board - no noticeably bad elements, though I suspect the ROM chip may have gotten fried (I have no actual evidence to this effect, just a gut feeling based on the way the unit boots up. Thank you for the link. The motherboard is less in $$ than anticipated, so, I need to decide to invest a little in the hopes that it offers the cure, or simply give up and part out the unit. Thank you again for all your contributions on this project. Dana On Sep 25, 11:40 am, mjoeyoung mjoeyo...@gmail.com wrote: I want to confirm that you switched CPUs (A in B slot and B in A slot) and that they were both seated properly when you turned the computer on. If CPU A is bad and CPU B is good putting CPU B in the A spot and CPU A in the B spot should allow the computer to boot. Both CPUs (even if one is bad) need to be installed for the computer to work. When I was fixing my problem I had both issues (unseated and only one installed). One of the earlier G5s was able to run with only one CPU installed in a 2 CPU system so you could try that, but I think it was an earlier model to yours. Have you replaced the battery? That can be the cause of various issues. I do not know of any motherboard checks except for visual inspection of bad capacitors. If the computer is making sounds and the fans eventually go into wind tunnel mode I would think the power supply is probably okay. The chance that BOTH processors went bad at the same time seems slim. So, I would guess logic board. I fixed mine on a whim just to see if it was possible before getting rid of it. These computers are so cheap now that it is almost not worth the time/effort to repair them. This is the storehttp://www.electronicscafe.com/ I purchased my parts from. They also sell on ebay. They have a motherboard that might work for about $17 and a pair of cpus for $25. -- 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: G5 Repair - Next step?
I want to confirm that you switched CPUs (A in B slot and B in A slot) and that they were both seated properly when you turned the computer on. If CPU A is bad and CPU B is good putting CPU B in the A spot and CPU A in the B spot should allow the computer to boot. Both CPUs (even if one is bad) need to be installed for the computer to work. When I was fixing my problem I had both issues (unseated and only one installed). One of the earlier G5s was able to run with only one CPU installed in a 2 CPU system so you could try that, but I think it was an earlier model to yours. Have you replaced the battery? That can be the cause of various issues. I do not know of any motherboard checks except for visual inspection of bad capacitors. If the computer is making sounds and the fans eventually go into wind tunnel mode I would think the power supply is probably okay. The chance that BOTH processors went bad at the same time seems slim. So, I would guess logic board. I fixed mine on a whim just to see if it was possible before getting rid of it. These computers are so cheap now that it is almost not worth the time/effort to repair them. This is the storehttp://www.electronicscafe.com/ I purchased my parts from. They also sell on ebay. They have a motherboard that might work for about $17 and a pair of cpus for $25. -- 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: G5 Repair - Next step?
I just checked my G5. It needs a Torx T10 to loosen the allen-wrench type screws. I'm pretty sure there is no need to touch any of the other screws. It only takes a little effort to pull out the CPU once the bolts are loosened. If it ends up being a CPU problem I can advise further. Good luck, and watch out for the cooling fins! -- 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: G5 Repair - Next step?
Thank you for the response, MJoe. I located the correct allen wrench and was able to do as you indicated. Turns out there are eight of the screws (4 per CPU) though the instructions referred to only 6, but all came apart with surprising ease once the CPUs came off (and they were pretty easy too once the screws were out of the way. Found a dislodged case seam screw once the motherboard came off. I was hoping that this may have been the issue all along (a rogue screw inadvertently jumper-ing a couple of chips - this did happen to me on a B+W G3 once before), but, once all put back together, alas, the unit was none the better, eliciting the same start-up issues. So, I am stuck with determining if it is a motherboard issue (bad ROM chip as another suggested) or bad CPUs - any tests I can do? (Fabian, Google lost your note to me where you copied some diagnostics from your Apple SSM for me - can you resend?) Thank you again, Dana On Sep 23, 11:03 am, mjoeyoung mjoeyo...@gmail.com wrote: I just checked my G5. It needs a Torx T10 to loosen the allen-wrench type screws. I'm pretty sure there is no need to touch any of the other screws. It only takes a little effort to pull out the CPU once the bolts are loosened. If it ends up being a CPU problem I can advise further. Good luck, and watch out for the cooling fins! -- 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: G5 Repair - Next step?
Greetings all, weighing in after some time. My thanks again for the more folks who posted providing valuable advice. MJoe Young, great pictures re: the initial take-apart - this will prove helpful for me when I attempt to re-seat the logic board, which is one of the service source manual's suggestions, as Fabian pointed out in his equally helpful note. Thank you all again - I shal attempt to keep you apprised as the project progresses (hopefully, that is - let's hope it doesn't devolve!). Regards, Dana On Sunday, September 16, 2012 7:46:07 PM UTC-4, DLC wrote: Greetings all, I'd like to seek advice for those who've tread down the path I need to take. A while back I donated a G5 tower (June 2004 model, 1.8GHz DP w/ PCI slots) to a small private school. Recently I was told by the teacher that it just stopped working, so I took it in and ascertained that the video card was the most likely culprit (issue= boot up chime, then nothing-nothing fires up, except the fans going full tilt if you wait a couple minutes, then you need to do a hard shutdown). Apparently not, as a replacement card (known good) and a 2nd used one I had failed to remedy the situation. Re-seating RAM, pulling 3rd party cards, new PRAM battery, returning unit to OEM status, and resetting the board all proved fruitless. So, I'm inquiring from those in the know what the next step is. Alas, all keystroke related remedies (resetting PRAM, NVRAM, single user and verbose mode, C key for optical, etc.) are not an option - the boot-up mode does not get far enough in to query the peripherals or seek an OS. I fear it may be bad processor or logic board, but maybe there's a way to verify or get around? Many thanks for any input. Regards, Dana -- 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: G5 Repair - Next step?
On 9/16/12 6:46 PM, DLC wrote: Greetings all, snip=== So, I'm inquiring from those in the know what the next step is. Alas, all keystroke related remedies (resetting PRAM, NVRAM, single user and verbose mode, C key for optical, etc.) are not an option - the boot-up mode does not get far enough in to query the peripherals or seek an OS. I fear it may be bad processor or logic board, but maybe there's a way to verify or get around? Have you checked for bad capacitors on mother board? -- The Website your boss doesn't want you to know about!http://www.sfi4.com/8770421/FREE -- 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: G5 Repair - Next step?
Thanks to all who responded. To continue in the hopes of gleaning more wisdom, here are some clarifications: 1) the computer used a standard VGA-based 17 monitor, though I did try a spare 15 ADC Apple display to see if it was a port-specific problem on the video card (no go). 2) As mentioned, I cannot reset the PRAM or NVRAM, as the boot sequence will not go far enough to query the keyboard or other peripherals (like the optical drive). 3) I did swap out the HD and put back in the known-good Apple OEM HD, again no luck, but I can re-attempt with a different HD. My sad suspicion is the motherboard (first) or processor board, but want to exhaust all options before I begin parting out the good components. Many thanks again, Dana On Sunday, September 16, 2012 7:46:07 PM UTC-4, DLC wrote: Greetings all, I'd like to seek advice for those who've tread down the path I need to take. A while back I donated a G5 tower (June 2004 model, 1.8GHz DP w/ PCI slots) to a small private school. Recently I was told by the teacher that it just stopped working, so I took it in and ascertained that the video card was the most likely culprit (issue= boot up chime, then nothing-nothing fires up, except the fans going full tilt if you wait a couple minutes, then you need to do a hard shutdown). Apparently not, as a replacement card (known good) and a 2nd used one I had failed to remedy the situation. Re-seating RAM, pulling 3rd party cards, new PRAM battery, returning unit to OEM status, and resetting the board all proved fruitless. So, I'm inquiring from those in the know what the next step is. Alas, all keystroke related remedies (resetting PRAM, NVRAM, single user and verbose mode, C key for optical, etc.) are not an option - the boot-up mode does not get far enough in to query the peripherals or seek an OS. I fear it may be bad processor or logic board, but maybe there's a way to verify or get around? Many thanks for any input. Regards, Dana -- 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: G5 Repair - Next step?
Further info for diagnostic purposes. I ran the unit without the metal cover on (but left the lucite flow panel in place). I can manipulate the on - off of the fans by removing the lucite panel (and replacing it) while the unit is on - this I can do within a 2' window - after that the fans come on full tilt, leaving me with a hard shutdown as an only option for turning them off. Hope this helps. Thanks, Dana On Sunday, September 16, 2012 7:46:07 PM UTC-4, DLC wrote: Greetings all, I'd like to seek advice for those who've tread down the path I need to take. A while back I donated a G5 tower (June 2004 model, 1.8GHz DP w/ PCI slots) to a small private school. Recently I was told by the teacher that it just stopped working, so I took it in and ascertained that the video card was the most likely culprit (issue= boot up chime, then nothing-nothing fires up, except the fans going full tilt if you wait a couple minutes, then you need to do a hard shutdown). Apparently not, as a replacement card (known good) and a 2nd used one I had failed to remedy the situation. Re-seating RAM, pulling 3rd party cards, new PRAM battery, returning unit to OEM status, and resetting the board all proved fruitless. So, I'm inquiring from those in the know what the next step is. Alas, all keystroke related remedies (resetting PRAM, NVRAM, single user and verbose mode, C key for optical, etc.) are not an option - the boot-up mode does not get far enough in to query the peripherals or seek an OS. I fear it may be bad processor or logic board, but maybe there's a way to verify or get around? Many thanks for any input. Regards, Dana -- 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
G5 Repair - Next step?
Greetings all, I'd like to seek advice for those who've tread down the path I need to take. A while back I donated a G5 tower (June 2004 model, 1.8GHz DP w/ PCI slots) to a small private school. Recently I was told by the teacher that it just stopped working, so I took it in and ascertained that the video card was the most likely culprit (issue= boot up chime, then nothing-nothing fires up, except the fans going full tilt if you wait a couple minutes, then you need to do a hard shutdown). Apparently not, as a replacement card (known good) and a 2nd used one I had failed to remedy the situation. Re-seating RAM, pulling 3rd party cards, new PRAM battery, returning unit to OEM status, and resetting the board all proved fruitless. So, I'm inquiring from those in the know what the next step is. Alas, all keystroke related remedies (resetting PRAM, NVRAM, single user and verbose mode, C key for optical, etc.) are not an option - the boot-up mode does not get far enough in to query the peripherals or seek an OS. I fear it may be bad processor or logic board, but maybe there's a way to verify or get around? Many thanks for any input. Regards, Dana -- 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: G5 Repair - Next step?
First, I would try to reset the pram: http://support.apple.com/kb/HT1379?viewlocale=en_US Then I would try to reset the SMU. http://support.apple.com/kb/HT1436 Good luck. Eric From: DLC dlcatft...@gmail.com To: g3-5-list@googlegroups.com Sent: Sunday, September 16, 2012 6:46 PM Subject: G5 Repair - Next step? Greetings all, I'd like to seek advice for those who've tread down the path I need to take. A while back I donated a G5 tower (June 2004 model, 1.8GHz DP w/ PCI slots) to a small private school. Recently I was told by the teacher that it just stopped working, so I took it in and ascertained that the video card was the most likely culprit (issue= boot up chime, then nothing-nothing fires up, except the fans going full tilt if you wait a couple minutes, then you need to do a hard shutdown). Apparently not, as a replacement card (known good) and a 2nd used one I had failed to remedy the situation. Re-seating RAM, pulling 3rd party cards, new PRAM battery, returning unit to OEM status, and resetting the board all proved fruitless. So, I'm inquiring from those in the know what the next step is. Alas, all keystroke related remedies (resetting PRAM, NVRAM, single user and verbose mode, C key for optical, etc.) are not an option - the boot-up mode does not get far enough in to query the peripherals or seek an OS. I fear it may be bad processor or logic board, but maybe there's a way to verify or get around? Many thanks for any input. Regards, Dana -- 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: G5 Repair - Next step?
if you havinga boot issues it might be the hard drive or software or motherboard On Sep 16, 2012, at 7:46 PM, DLC wrote: Greetings all, I'd like to seek advice for those who've tread down the path I need to take. A while back I donated a G5 tower (June 2004 model, 1.8GHz DP w/ PCI slots) to a small private school. Recently I was told by the teacher that it just stopped working, so I took it in and ascertained that the video card was the most likely culprit (issue= boot up chime, then nothing-nothing fires up, except the fans going full tilt if you wait a couple minutes, then you need to do a hard shutdown). Apparently not, as a replacement card (known good) and a 2nd used one I had failed to remedy the situation. Re-seating RAM, pulling 3rd party cards, new PRAM battery, returning unit to OEM status, and resetting the board all proved fruitless. So, I'm inquiring from those in the know what the next step is. Alas, all keystroke related remedies (resetting PRAM, NVRAM, single user and verbose mode, C key for optical, etc.) are not an option - the boot-up mode does not get far enough in to query the peripherals or seek an OS. I fear it may be bad processor or logic board, but maybe there's a way to verify or get around? Many thanks for any input. Regards, Dana -- 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: G5 Repair - Next step?
On Sep 16, 2012, at 4:46 PM, DLC wrote: Greetings all, I'd like to seek advice for those who've tread down the path I need to take. A while back I donated a G5 tower (June 2004 model, 1.8GHz DP w/ PCI slots) to a small private school. Recently I was told by the teacher that it just stopped working, so I took it in and ascertained that the video card was the most likely culprit (issue= boot up chime, then nothing-nothing fires up, except the fans going full tilt if you wait a couple minutes, then you need to do a hard shutdown). Does this one have an Apple Cinema monitor? One professor here had this happen and it turned out to be the power supply on his 23 monitor (which is tied into the video, usb and firewire ports). It was replaced under warrantee, then when a second one went, he made them replace it with the much beefier unit for a 31 and it's worked ever since. -- Bruce Johnson Wherever you go, there you are B. Banzai, PhD -- 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
