On 2/6/10 11:36 PM, Jonas Ulrich wrote:
Hi all, someone gave me this iMac the other day, and it has the dreaded
graphics issue: Anything of a light color on the screen is distorted and
has small lines and distorted pixels. (see picture) I've determined this
is not a screen problem because I took a screen shot and opened it on
another machine and saw the problem still. Here is what I've tried:
Zapped pram
Reset nvram
Reset SMU
Reinstalled the OS
Cleaned inside and re seated all the cables.
Checked capacitors, there is NO swelling or leaking
Is there something I can try to fix the graphics chip? What exactly is
the problem? Thanks in advanced!
P.S It is the 2nd generation imac 20" with a 2.0GHZ G5 Processor.
First, try creating a new user account and see if the problem exists in
that account. That will rule out user settings (weird ones at that).
Second try booting from an installer disk to see if you see it there.
If it's there then it's a hardware problem. If not you should probably
wipe the disk and reinstall the OS. I'd recommend this anyway on a
new-to-you computer.
--
Clark Martin
Redwood City, CA, USA
Macintosh / Internet Consulting
"I'm a designated driver on the Information Super Highway"
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