Re: LCD screen flickering and going black.
On Jan 5, 2:17 pm, dorayme Had a moment this morning to see if I could open the LCD screen. I have been putting it off because it never looked easy! I located the part I probably need, the tube in US. ...Am stuck for now. Am searching web for tips and found some but I dunno... I need better set of tools, guitar plucks and stuff. Not quite sure whether I should force the lip from the back off, or from the front off. I am taking pics of everything but I won't bother folks here unless there is someone who has actually taken one of these mothers apart... g Well, that would be me now. Managed to spring the guts out out of the frame. You must not be too feint hearted as I was for a while. I plunged a flat screen drive blade in one of the 4 or five tiny square holes in the rim and twisted and that little bit sprang a gap. Working all around, it all came off!. The fluro tube is buried deeper still and I will approach it slowly... I hope this is not too boring for everyone. Maybe someone will want to know. --~--~-~--~~~---~--~~ You received this message because you are subscribed Low End Mac's G3-5 List, 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 To unsubscribe from this group, send email to g3-5-list-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/g3-5-list?hl=en Low End Mac RSS feed at feed://lowendmac.com/feed.xml -~--~~~~--~~--~--~---
Re: LCD screen flickering and going black.
On Dec 4 2008, 8:55 pm, Kris Tilford ktilfo...@cox.net wrote: On Dec 4, 2008, at 3:36 AM, dorayme wrote: I have been looking at: http://www.inventgeek.com/Projects/shorts/overview.aspx to prepare myself! You folks might like to know this url. I will buy a new monitor and consider fixing this one at my leisure. I like the sound of $20 for parts! Good find! Had a moment this morning to see if i could open the LCD screen. I have been putting it off because it never looked easy! I located the part I probably need, the tube in US. And it is not easy! Am stuck for now. Am searching web for tips and found some but I dunno... I need better set of tools, guitar plucks and stuff. Not quite sure whether I should force the lip from the back off, or from the front off. I am taking pics of everything but I won't bother folks here unless there is someone who has actually taken one of these mothers apart... g (In the meantime I bought a widescreen 20 for $199 Australian with 3 year guarantee (with this price I would be happy to throw it out after three years!). So I am not in a hurry.) I've got a 17 that I garbage picked that needs a new backlight, this makes it look easy enough! Thanks! --~--~-~--~~~---~--~~ You received this message because you are subscribed Low End Mac's G3-5 List, 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 To unsubscribe from this group, send email to g3-5-list-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/g3-5-list?hl=en Low End Mac RSS feed at feed://lowendmac.com/feed.xml -~--~~~~--~~--~--~---
Re: LCD screen flickering and going black.
On Dec 6, 2:29 am, Bruce Johnson john...@pharmacy.arizona.edu wrote: On Dec 5, 2008, at 1:53 AM, dorayme wrote: If it has solved the problem I am sort of wondering what could have happened in general terms? I fire up a PC now and then and switch it to VGA. The Mac runs on the DVI input. I also experimented with a set top box for TV on yet another input, composite I think. Perhaps all these inputs confused the power saving software inside the monitor? It may have been the switching stuff. Most monitors autosense the input and switch to the appropriate input, if that circuitry was confused it could have been randomly switching. Was it showing the icons for the inputs when it did this? No, saw nothing like this. Have not switched on my PC for days, and certainly not since I reset the monitor to factory. Just been on the dvi on my Mac. Latest news: although my previous reset to factory was followed by quite a few days of rock steady performance, it is back to its tricks and now so bad that I have actually shifted my menu and stuff to the lower quality 19 next to it. The 20 has been not only flickering a lot but blanked out completely a lot. I can stir it by switching it off and on. But it does not last too long now. I see a progressive disease here! I will either have a go at fixing it or get someone to quote. I am interested to nail as much as I can about its likely cause from the symptoms though. If it was not just a coincidence that reset to factory steadied it for so many days, what does this give a clue to? Beats me, I would think the fluro was not affected by factory reset, it just burns bright doesn't it? The controls and colours coming from liquid crystal thingies moderating the light, no? --~--~-~--~~~---~--~~ You received this message because you are subscribed Low End Mac's G3-5 List, 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 To unsubscribe from this group, send email to g3-5-list-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/g3-5-list?hl=en Low End Mac RSS feed at feed://lowendmac.com/feed.xml -~--~~~~--~~--~--~---
Re: LCD screen flickering and going black.
On Dec 5, 2008, at 1:53 AM, dorayme wrote: If it has solved the problem I am sort of wondering what could have happened in general terms? I fire up a PC now and then and switch it to VGA. The Mac runs on the DVI input. I also experimented with a set top box for TV on yet another input, composite I think. Perhaps all these inputs confused the power saving software inside the monitor? It may have been the switching stuff. Most monitors autosense the input and switch to the appropriate input, if that circuitry was confused it could have been randomly switching. Was it showing the icons for the inputs when it did this? -- 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 subscribed Low End Mac's G3-5 List, 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 To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/g3-5-list?hl=en Low End Mac RSS feed at feed://lowendmac.com/feed.xml -~--~~~~--~~--~--~---
Re: LCD screen flickering and going black.
On Dec 4, 5:58 am, Bruce Johnson [EMAIL PROTECTED] wrote: On Dec 3, 2008, at 11:56 AM, dorayme wrote: I looked up the model on Google but have difficulty knowing what technology it really employs re fluro or LED? If you didn't buy in in the last six months or so it's a fluorescent model. If you did, it's still likely a fluorescent model; the manual should state for sure. If the manual contains warnings about mercury, it's a fluorescent backlit model. In that case, being 3.5 years old, it looks like its a fluro. Must see if I still have a manual for it. Can't remember but it would have been a flimsy lowdown brochure! I have been looking at: http://www.inventgeek.com/Projects/shorts/overview.aspx to prepare myself! You folks might like to know this url. I will buy a new monitor and consider fixing this one at my leisure. I like the sound of $20 for parts! It is hard to know, but I scanned some Dell forums and I was reminded to reset the monitor to factory settings. It has been rock solid since. But it has also been on for 12 hours and has been this solid before recently. I will see tomorrow. --~--~-~--~~~---~--~~ You received this message because you are subscribed Low End Mac's G3-5 List, 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 To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/g3-5-list?hl=en Low End Mac RSS feed at feed://lowendmac.com/feed.xml -~--~~~~--~~--~--~---
Re: LCD screen flickering and going black.
On Dec 4, 2008, at 3:36 AM, dorayme wrote: I have been looking at: http://www.inventgeek.com/Projects/shorts/overview.aspx to prepare myself! You folks might like to know this url. I will buy a new monitor and consider fixing this one at my leisure. I like the sound of $20 for parts! Good find! I've got a 17 that I garbage picked that needs a new backlight, this makes it look easy enough! Thanks! --~--~-~--~~~---~--~~ You received this message because you are subscribed Low End Mac's G3-5 List, 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 To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/g3-5-list?hl=en Low End Mac RSS feed at feed://lowendmac.com/feed.xml -~--~~~~--~~--~--~---
Re: LCD screen flickering and going black.
On Dec 4, 8:55 pm, Kris Tilford [EMAIL PROTECTED] wrote: On Dec 4, 2008, at 3:36 AM, dorayme wrote: I have been looking at: http://www.inventgeek.com/Projects/shorts/overview.aspx to prepare myself! You folks might like to know this url. I will buy a new monitor and consider fixing this one at my leisure. I like the sound of $20 for parts! Good find! I've got a 17 that I garbage picked that needs a new backlight, this makes it look easy enough! Lesh get good at it and start a business Kris and both of us get filthy rich. g Thanks! --~--~-~--~~~---~--~~ You received this message because you are subscribed Low End Mac's G3-5 List, 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 To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/g3-5-list?hl=en Low End Mac RSS feed at feed://lowendmac.com/feed.xml -~--~~~~--~~--~--~---
Re: LCD screen flickering and going black.
Sometimes the problem can be a bad power supply, and the symptom is probably no picture rather than flickering. But sometimes a failing power supply can goof up the backlight, too. --~--~-~--~~~---~--~~ You received this message because you are subscribed Low End Mac's G3-5 List, 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 To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/g3-5-list?hl=en Low End Mac RSS feed at feed://lowendmac.com/feed.xml -~--~~~~--~~--~--~---
Re: LCD screen flickering and going black.
On Dec 3, 2008, at 11:56 AM, dorayme wrote: I looked up the model on Google but have difficulty knowing what technology it really employs re fluro or LED? If you didn't buy in in the last six months or so it's a fluorescent model. If you did, it's still likely a fluorescent model; the manual should state for sure. If the manual contains warnings about mercury, it's a fluorescent backlit model. -- 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 subscribed Low End Mac's G3-5 List, 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 To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/g3-5-list?hl=en Low End Mac RSS feed at feed://lowendmac.com/feed.xml -~--~~~~--~~--~--~---
Re: LCD screen flickering and going black.
I find this thread very interesting, as I've had the original Apple Studio Display since 1998 and an Anniv. Mac since 1999, both from MacMall, for $1999 and $1299...both new and sealed. Guess what? they're both still in perfect shape to this day. The ASD (the first of it's kind. XGA res., self-calibration via. ADB, S-Video input which came in very handy when my Phillips POS 37 LCD HDTV just stopped working...how I miss the Ambilight feature...AND it was the first Mac product that is totally translucent, in a stunning mix of purplish-blue blackish-blue, with a gorgeous original Apple multi- color logo where an iSight would be) was for my 8500/120mhz604/2x300mhz604eMach5+/550mhzG4 on switchable daughtercards/ 128 RAM/4 MB VRAM On-Board/Apple 12 166 MHZ Pentium Card with 72 RAM n ATI Mach64 graphics for NeXTSTEP 4/ATI RAGE 128 16MB PCI/FW400USB2 PCI Card (love that thing...was my main system till 2006 when I got my Mac Pro 4-Core Xeon system; now it's for OS 7.6 (to play with all the Tech of the time, some builds of Copland, BeOS PR 5.2a, Rhapsody DR 1 2, OS 9 for classic apps/PC Card for NeXTSTEP, Win98SE, Rhapsody Intel, Win2k which I still HAVE to use for work/OS X DP3 DP4, 10.4.11 Tiger...), so while I'm still forced to use it for work and my Web Server, it's my favorite machine; literally a Time Machine. The TAM was a total impulse buy. I was going to buy a new G4/500 when it was announced, but when they couldn't get the G4 and I was on the phone with them flipping through their mag and saw the TAM for $1299, that was it. They were already making upgrades for it and I was in love. Had them install a Sonnet G3 card in it, and in 2002 I upgraded it to OS X and threw a FW400/USB2 PCI Card in it, using one USB Port for 802.11g AirPort and yes, it's fast, stable, and the display is bright and crisp (OS X in 800 x 600 actually can be made to work quite well...just made everything smaller with tinkertool); BTW it's my office entertainment center with iTunes and Apple Video Player / Apple FM Tuner running through Classic. Awesome BOSE audio and great with video. That unit gets NO display downtime; just has a screensaver going all night. I thought LCDs couldn't burn out...It may have taken me a while, but thx ppl- now I've set my 8500 with the ASD, tfe TAM, and the Pro workstation with my two Apple HD 23 panels to go off. But also remember; it's been 10 years and they're both perfect, crisp, and bright. I hope Apple used the same supplier on the HD Cinemas as they did for the ASD and TAM. But hey, if the TAM display goes, I'll get a hi-res 12-incher to put in there and create something truly amazing with that machine. In person it's obvious there was never another PC or Mac with that level of industrial design ever produced; I couldn't even part with the boxes. Joey. Sent from Joey's iPhone 3G 2.1 on ATT's all-new wireless network. Visit www.apple.com/iphone for more information. Apple ATT - Raising the Bar. On Dec 1, 2008, at 3:46 PM, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: On Dec 1, 1:26 am, Kris Tilford [EMAIL PROTECTED] wrote: Newer LCDs are now lit with LEDs that last almost forever, so this shouldn't be an issue in the future, Don't believe all the hype about LED lighting. It's getting there, but it isn't there yet. If you read the datasheets for the high intensity (HI) LEDs on the manufacturer's sites you will find that they predict a 50,000 hour lifetime to 70% brightness. A good fluorescent tube has a *specified* lifetime of 30,000 hours to 80% brightness. The manufacturers give no information on whether that decay to 70% brightness is linear, front-loaded or rear-loaded. So they last a long time, but not forever. The HI LEDs currently on the market are barely as energy efficient as good high intensity fluorescents, although they may be better than the tubes used in LCD displays. Compared to HO T5 fluorescent room/ aquarium/greenhouse lighting they are still behind. The equipment cost for the latest HI LEDs is 15 - 20 times as high per available light intensity as fluorescent, although, again, the comparison may be different in applications specific to LCD panels where 12V supply may already be available and so represent a cost savings over providing a ballast equivalent for fluorescent tubes. However, the LED cost for 5000 lumens of light is about $300 - $400 where the fluorescent tube cost is about $20, that's ignoring power supplies. There are some better LEDs in the labs which haven't made it into mass production yet, and the technology is improving quickly. But it is not better than fluorescent. --~--~-~--~~~---~--~~ You received this message because you are subscribed Low End Mac's G3-5 List, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at
Re: LCD screen flickering and going black.
Hi Kris: Are you able to say when Apple started using LEDS, from what set of machines. I'm asking because if I get into the market, I'd rather get one of those. Thanks! On Mon, Dec 1, 2008 at 1:26 AM, Kris Tilford [EMAIL PROTECTED] wrote: On Nov 30, 2008, at 7:31 PM, dorayme wrote: It has started flickering now and then, and sometimes goes right blank, all black. Original LCD monitors have fluorescent backlights that burn out just like any fluorescent bulb does. They can be replaced, and you may be able to do it yourself? I don't know where to get them, and it might be good to remove the old one to get a model # off it? Newer LCDs are now lit with LEDs that last almost forever, so this shouldn't be an issue in the future, although I imagine there will be a good business for replacing the fluorescents once all these LCD TVs being sold start burning out? I somehow doubt there will be a simple way to replace a burned out fluorescent with a replacement LED for a one time only fix. Only the newest Apple monitors and laptops have LED backlights, but in two years it's predicted that fluorescent backlighting will be virtually extinct in all LCDs. --~--~-~--~~~---~--~~ You received this message because you are subscribed Low End Mac's G3-5 List, 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 To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/g3-5-list?hl=en Low End Mac RSS feed at feed://lowendmac.com/feed.xml -~--~~~~--~~--~--~---
Re: LCD screen flickering and going black.
On Nov 30, 9:03 pm, Doug McNutt [EMAIL PROTECTED] wrote: Cracked solder joints often respond to a sharp tap that accelerates the circuit board edge-wise a bit. Not as much as a sledgehammer but sharp. Your symptoms sound a bit like that. Heh. Just like the old pin 1 problem on the analog = logic cable on the *original* Macintosh through the Mac Plus. :-) The solder on the connector on the analog board goes bad and the screen goes blank. A sharp rap to the side of the Mac brings it back, for a while... --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups G3-5 List group. To post to this group, send email to g3-5-list@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/g3-5-list?hl=en -~--~~~~--~~--~--~---
LCD screen flickering and going black.
I have had a rather expensive 20 LCD screen working pretty solidly every day for 3.5 years (off overnight mostly). It has started flickering now and then, and sometimes goes right blank, all black. Turning it off and on and stuff gets it going again. It tends to happen before it has been on for many hours. It can happen in the first hour or two... The AC to 12V seems to get rather hotter than I would guess intuitively (but what would I know?). Tied a bag of ice around it but did not seem to do anything? Anyway, it might not be that? Anyone experienced flickering and occasional all blank screen on LCDs? I doubt it is anything to do with my G4 Mac because the same happens when I switch from the DVI (the Mac) to the D-Sub (a Windows box) input - there's a button on the front that takes the signals from different inputs (even composite for TV set-top box) Might have to take it for repair or simply buy another and treat it as hired for 3.5 years! -- dorayme --~--~-~--~~~---~--~~ You received this message because you are subscribed Low End Mac's G3-5 List, 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 To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/g3-5-list?hl=en Low End Mac RSS feed at feed://lowendmac.com/feed.xml -~--~~~~--~~--~--~---
Re: LCD screen flickering and going black.
At 12:31 +1100 12/1/08, dorayme wrote: I have had a rather expensive 20 LCD screen working pretty solidly every day for 3.5 years (off overnight mostly). It has started flickering now and then, and sometimes goes right blank, all black. Turning it off and on and stuff gets it going again. It tends to happen before it has been on for many hours. It can happen in the first hour or two... The AC to 12V seems to get rather hotter than I would guess intuitively (but what would I know?). Tied a bag of ice around it but did not seem to do anything? Anyway, it might not be that? A few months ago I read about LCDs that went totally dark. The document said, emphasis theirs: Your problem IS a bad solder joint in the lamp power supply board and it is likely associated with the larger wires on its inductors. I took the thing apart and hit the larger solder joints with an iron and some rosin flux and the display came to life and ran for almost a year until the same thing happened. It's sitting on my workbench now. Cracked solder joints often respond to a sharp tap that accelerates the circuit board edge-wise a bit. Not as much as a sledgehammer but sharp. Your symptoms sound a bit like that. -- -- A fair tax is one that you pay but I don't -- --~--~-~--~~~---~--~~ You received this message because you are subscribed Low End Mac's G3-5 List, 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 To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/g3-5-list?hl=en Low End Mac RSS feed at feed://lowendmac.com/feed.xml -~--~~~~--~~--~--~---
Re: LCD screen flickering and going black.
On Nov 30, 2008, at 7:31 PM, dorayme wrote: It has started flickering now and then, and sometimes goes right blank, all black. Original LCD monitors have fluorescent backlights that burn out just like any fluorescent bulb does. They can be replaced, and you may be able to do it yourself? I don't know where to get them, and it might be good to remove the old one to get a model # off it? Newer LCDs are now lit with LEDs that last almost forever, so this shouldn't be an issue in the future, although I imagine there will be a good business for replacing the fluorescents once all these LCD TVs being sold start burning out? I somehow doubt there will be a simple way to replace a burned out fluorescent with a replacement LED for a one time only fix. Only the newest Apple monitors and laptops have LED backlights, but in two years it's predicted that fluorescent backlighting will be virtually extinct in all LCDs. --~--~-~--~~~---~--~~ You received this message because you are subscribed Low End Mac's G3-5 List, 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 To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/g3-5-list?hl=en Low End Mac RSS feed at feed://lowendmac.com/feed.xml -~--~~~~--~~--~--~---
