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Mar 30, 2013 11:10 AM in response to radiochrisby rccharles,★HelpfulPerhaps the lcd is going bad.
G5 has these hardware issues:
-- bad capacitors on logic board
-- bad capacitors in power supply
-- badly soldered video chip
-- Allan Jones
There were several Mac models with flat panel displays that had bad displays. Most had serial numbers beginning
with "W8"---the code for one specific factory. This affected PowerBooks as well. If that's the case, the rest of the computer is probably fine.
https://discussions.apple.com/message/21630224#21630224
You may have a problem with the video chip.
Here is how to tell...
Shutdown your machine. Hold down the shift key. Poweron. Bootup will be longer.
Wait awhile while you harddrive is being checked.
An article on how to boot into safe mode.
http://support.apple.com/kb/ht1455
Runs OK in safe mode...
Running in Safe mode leaves out some video drivers. Which results in your machine not using advanced video hardware. As luck would have it, you can run the safe mode video drivers in normal mode.
Here is how:
https://discussions.apple.com/message/16057567#16057567
Look through the above thread. See the second page. You don't have to read through the first page. Just go to the part where I try a solution that works.
Summary of G5 problems. Includes instructions on a hardware fix for the brave at heart:
See -Rotten Apple- articles in both of these threads.
https://discussions.apple.com/thread/4023152?tstart=0
https://discussions.apple.com/message/18700825#18700825
Robert