Overall Problem with Everything..It's now dead.

[IcerC]

My iMac G5 stopped working overnight. When I turned it on in the morning, the screen was flickering, loads of graphical artefacts such as random-coloured lines and pixels danced across the screen. Several times it wouldn't finish logging in.

After rebooting a few times I managed to enter my account. Got a kernel panic, which is just about the worst error a computer can get.

We cracked open the computer (with a screwdriver), and removed both RAM components in turn, but to no avail. If anything, it made it worse. Could it have been a problem with the VRAM? Well, when I was playing Black & White, and the graphics started screwing up, the sound did as well. Plus, when we turn on the computer, the disk spins up a bit, and then dies. The screen never turns on.

 

[Biturbo V12 AMG]

try running the test CD that came with your computer. it should be the CD labled OSX reinstall/hardware test put the CD in start the computer up and hold the C key then run the test. if you cant get it to run the test or even enter into the test screen take your computer to the apple store or call tech support.