The vertical lines issue on the G5 and Intel iMacs is a common one. My 2006 Intel iMac has gotten its screen replaced 4 times (the problem returned after some days...). So far the 4th screen is working well, it is in the first month of the replacement parts warranty.
I got the first screen replaced because of an Apple authorized out-of- warranty repair (the first vertical line appeared shortly after the 2- year warranty period). I believe it is a screen issue, because I used the external port for another display and it worked fine, with no artifacts whatsoever. Check Apple discussions, they have a pretty good topic on that. It appears the problem started with the first 17'' aluminum PowerBooks, which use the same panel as both the 17'' G5 and Intel iMacs. MM On Jun 27, 1:59 am, JOHN CARMONNE <[email protected]> wrote: > On Jun 26, 2010, at 5:47 PM, Jim Scott wrote: > > > > > > > > > On Jun 26, 2010, at 5:36 PM, JOHN CARMONNE wrote: > > >> On Jun 26, 2010, at 5:23 PM, Jim Scott wrote: > > >>>> I don't have another machine to test the display in so I'll have > >>>> to put in the new display and I guess kinda hope it's OK, can > >>>> the display work awhile and then crap out due to a capacitor > >>>> problem? Also can the Apple ASD pickup this defect? > > >>> Both ASD (in OS mode) and Apple Hardware Test (should be on the > >>> install DVD) are pretty good about catching problems with the > >>> video circuitry. However, I just processed an iMac G5 17" ALS > >>> which passed both ASD and AHT tests (4 in all) without an error, > >>> yet sports one popped/leaking capacitor on the logic board and > >>> throws occasional artifacts on the LCD. It also refuses to boot > >>> to the desktop and freezes right at the transition from the grey > >>> screen to the blue screen. Yet it will boot to the desktop in > >>> Safe Mode, which has lower demands on the video circuitry. It's > >>> sitting on a shelf awaiting a new batch of capacitors. FWIW, this > >>> iMac also chimes on startup, which means it passes POST. So it's > >>> worth replacing the 29 caps on the logic board to save it (I hope). > > >>> Jim > >> I haven't seen any of these caps, are they big enough for a 65 > >> year old to see? I can solder OK if I can see the joint site > >> clearly, Really 29 of them? I have a TiBook board that I know the > >> burned caps but I can't see that small to fix it plus it's a 400 > >> MHz so who cares? The machine in question is running a 23" HP > >> monitor I put for the kids about 8 mos ago and it works great so > >> is that an indication the boards are OK? > > > Yep, the capacitors are big enough for even a 70-year-old to > > see. :^) Yep, there are as many as 29 caps on an iMac G5 logic > > board up through the ALS model. Go here to learn more: <http:// > > jimwarholic.com/2008/07/how-to-repair-apple-imac-g5.php>. > > > Jim > > This is great addition to my repair manual folder. It looks like a > good weekend project. I got one of the lighted magnifier head sets > from Harbor freight but it's not what I expected so I need to find a > better one then I'll feel like tackling this. Thanks Jim. > > JOHN CARMONNE > Yorba Linda USA > From TiBook 800 -- 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 [email protected] For more options, visit this group at http://groups.google.com/group/g3-5-list
