Video 'lace curtain' and kernel panics

Question

Early G5 iMac, EMC 1989 (1st gen), bought in Sydney, Australia. Model No falls in the repair extension program for video and power, but that has now finished. Started showing the grid of fine dots and vertical lines, similar to other threads in this Forum, and had several kernel panics, at about the same time. It still turns on and works, but does not redraw the screen properly when scrolling, or when moving windows, and eventually the cursor won't move. Opened it up and tested, and found :-
. logic board capacitors 'Rubycon' with K on top, all look good, no bulging,
. power supply capacitors also good, voltages ok,
. diagnostic LEDs 1, 2, 3 ok.
. panic logs say (in part), indicating a problem with the video processing? -
' Kernel loadable modules in backtrace (with dependencies):
com.apple.GeForce(3.4.2)@0xbf8000
dependency: com.apple.iokit.IOPCIFamily(1.4)@0x398000
dependency: com.apple.iokit.IOGraphicsFamily(1.3.5)@0x4bb000
dependency: com.apple.NVDAResman(3.4.2)@0x4f1000
dependency: com.apple.iokit.IONDRVSupport(1.3.5)@0x4db000
Exception state (sv=0x23296500)'
. apple hardware test stopped at 27sec while checking the logic board, with error code '2GMC/2/15 :builtin'.
Can anyone please advise whether that error is associated with the video? I'm thinking that repairing the video BGA connection is more likely to fix the problem than replacing the capacitors.
Thank you.

Answer 1

Kernel panics are a sign of hardware problems. Boot from System DVD #1 *that originally came w/your computer* and run the Hardware Test. _Read the DVD label to find out which key you need to boot up from to run the Hardware Test._
User Tips: Kernel Panics
!http://i53.tinypic.com/2wqybd0.gif!