Kernel Panic probably caused by Video Card: solutions?

Question

Hi,
I have a G4 iBook, 12", 1.2 GB Ram, 1.2 Ghz, should be "Late 2004" Model.
This morning, while I was surfing, suddenly OS X crashed, just freezing everything on my screen (not the multi-language kernel panic screen), still on and working but no movement on the screen. Surprised, I hold down the power button and then again to start it again. Read the kernel panic (KP) log, send it to Apple and just after few minutes it does the same. The KP log is always the same, I use it for about a minute, then it happens again. Another reboot and then the iBook stops just before the login window. So, if I switch it on, it chimes, usual grey Apple logo, then the screen becomes blue as it always used to do before showing the login window but the it stops there.
If I boot with command-S, I obtain a working root command line, didn't check if it hangs in this way. If I boot in Safe Mode, it works, but it hangs there as well after few minutes. As you see in the KP Log, the cause is probably the ATI Graphic Card (even cnsidering that screen just freezes, as if the graphic card doesn't send nothing new to the screen), but I have no idea how I could solve this issue.
KP Log is the following:
Mon Apr 26 11:36:01 2010
panic(cpu 0 caller 0x000B0504): "Uncorrectable machine check: pc = 00000000165363B0, msr = 0000000000149030, dsisr = 40000000, dar = 0000000018BD9002\n" " AsyncSrc = 0000000000000000, CoreFIR = 0000000000000000\n" " L2FIR = 0000000000000000, BusFir = 0000000000000000\n"@/SourceCache/xnu/xnu-1228.15.4/osfmk/ppc/trap.c:975
Latest stack backtrace for cpu 0:
Backtrace:
0x0009CC88 0x0009D63C 0x00029DA0 0x000B0504 0x000B0784 0x000B4278
Proceeding back via exception chain:
Exception state (sv=0x323a6780)
PC=0x165363B0; MSR=0x00149030; DAR=0x18BD9002; DSISR=0x40000000; LR=0x1653648C; R1=0x323835F0; XCP=0x00000008 (0x200 - Machine check)
Backtrace:
0x00000000 0x1653648C 0x1653C8AC 0x1653DFF4 0x16536B7C 0x165314E8
0x16531BA0 0x16531D10 0x00770B98 0x007757F4 0x00779AB8 0x0077B7B0 0x0075F910 0x007559AC
0x00347B40 0x0037E190 0x00094458 0x0002C100 0x00024B58 0x000B45CC 0x00000000
Kernel loadable modules in backtrace (with dependencies):
com.apple.driver.ndrv.ATY,Via.0x16531cbc(1.0.0b94)@0x16530000->0x1654efff
com.apple.iokit.IONDRVSupport(1.7.3)@0x76f000->0x786fff
dependency: com.apple.iokit.IOPCIFamily(2.6)@0x735000
dependency: com.apple.iokit.IOGraphicsFamily(1.7.3)@0x749000
com.apple.iokit.IOGraphicsFamily(1.7.3)@0x749000->0x76efff
dependency: com.apple.iokit.IOPCIFamily(2.6)@0x735000
Exception state (sv=0x32395280)
PC=0x9330D1D8; MSR=0x0200F030; DAR=0xB0016FE8; DSISR=0x42000000; LR=0x93314100; R1=0xBFFFF1E0; XCP=0x00000030 (0xC00 - System call)
BSD process name corresponding to current thread: WindowServer
Mac OS version:
9L30
Kernel version:
Darwin Kernel Version 9.8.0: Wed Jul 15 16:57:01 PDT 2009; root:xnu-1228.15.4~1/RELEASE_PPC
System model name: PowerBook6,5
Any ideas? Any help?

Answer 1

I believe you're right; your graphics card has some trouble. The iBooks are notorious for such things, unfortunately. I believe the heat of the machine causes the connections to loosen.
If you're in the US, you can send the logic board to Super Reball and have them fix up the connections; I believe the cost is around $75, if you remove the board yourself.
~Lyssa