VRAM failed Tech Tool deluxe and Apple hardware test

My G5 (isight) keeps 'freezing' so I ran the Tech Tool and Apple hardware test and they both say that my VRAM 'failed'.
The hardware test gave an error code2ATI/I/4: 113-xxxxx-113
How big is this to fix? I've started up from the install disk and the disc utility said the Hard Drive was fine. ny suggestions would be really useful.
Thanks
Andrew

Andrew, I would suggest you call Apple back and tell them that things are not ok, if you erased the drive, it should have repaired any bad sectors, something is not right. If you have Apple Care (I hope you do), insist that someone test your machine. Be sure to make a full backup before you take it in, I use SuperDuper!.
Good luck and please post back,

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