iMac G4 800MHZ with 1 GB SDRAM video screen has vertical color lines after start up then after 20 to 45 minutes the desk top comes on but bottom flickers or jumps? what is the problem?
thanks
Paulrapid
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reply by
QEII Student IT Nov 7 @ 8:37 AM
Hi Paul,
We had a problem like this with a iMac G5 and we concluded it was a logic board issue.
It took a long time to boot and lots of red dots appeared on screen before it froze.
Try running an Apple Hardware Disc to see if your logic board is broken
reply by
paulrapid Nov 7 @ 7:18 PM
QEII Thank-you
reply by
paulrapid Nov 7 @ 7:24 PM
Can I use the monitor from the G4 iMac without the logic board by make another base and connector to connect to say a mac mini?
reply by
paulrapid Nov 7 @ 7:55 PM
Used Apple Hardware Test CD and all passed, Ram, Logic board. Still the video screen has lines and jumps but I can see the Desktop and work ! What next?
reply by
machead3 Nov 7 @ 9:36 PM
Sounds like the video cable or screen- (laptop screens do this all the time) if replacing the screen is beyond your ability sounds like you may have a "parts" box.
Look here [http://www.mac-pro.com/Mac-Pro-Online-Store/G4-iMac-Parts-Flat-Panel-700Mhz-800Mhz}
BTW you can buy a just an LCD screen many places online once you have the pertinent data off the back of the display.
Good Luck,
N.