Kernel panic help

Question

Level 1

12 points

Kernel panic help

My iMac g5, 1.8ghz had it's power supply die.
It had been on the way out (couldn't sleep and wake) but I waited until it was totally dead.
So I bought one from Apple Palace, supposedly new from Apple.
Installed it, restored my hard drive from the back up (it had a kernel panic as the PS was dying) and it ran Ok for a couple of days.

Then it had another kernel panic, where it gives me the gray box saying I have to restart.

I have tried an alternate keyboard, still panics.
ran rember and the ram passed 3 tests (when I could get it to boot long enough)

One thing it does almost every time I can get it to boot is there are lines of pixels running vertically.

Right now I can't get it to boot to the 10.4 install disk I have.
I don't have the original disks, so I can't run the hardware test.

I have run through these suggestions:
http://www.thexlab.com/faqs/kernelpanics.html

Couldn't check firmware since I haven't had it boot long enough without crashing. (but it was running for months before the power supply failed)

It did boot for a short while after I reformatted and installed a fresh OS 10.4 again. But that eventually panicked too.

I do have two of the logs from panics that I could save.

Any thoughts?

Did I get another bad power supply?

Thanks for any tips.

Here's one of the panic logs:

Unresolved kernel trap(cpu 0): 0x300 - Data access DAR=0x000000003071434E PC=0x000000002FBABD3C
Latest crash info for cpu 0:
Exception state (sv=0x2FFBA780)
PC=0x2FBABD3C; MSR=0x00009030; DAR=0x3071434E; DSISR=0x40000000; LR=0x2FBABD24; R1=0x174CBAE0; XCP=0x0000000C (0x300 - Data access)
Backtrace:
0x2FBAD6C4 0x2FBAC82C 0x2FBA7D5C 0x2FB94C74 0x002E9A80 0x002EB94C
0x0008C248 0x00029234 0x000233F8 0x000ABEAC 0x02173140
backtrace terminated - frame not mapped or invalid: 0xBFFFE900

Kernel loadable modules in backtrace (with dependencies):
com.apple.GeForce(4.1.8)@0x2fb89000
dependency: com.apple.iokit.IOPCIFamily(1.7)@0x27620000
dependency: com.apple.iokit.IOGraphicsFamily(1.4.2)@0x2f503000
dependency: com.apple.iokit.IONDRVSupport(1.4.2)@0x2c0b1000
dependency: com.apple.NVDAResman(4.1.8)@0x307d6000
Proceeding back via exception chain:
Exception state (sv=0x2FFBA780)
previously dumped as "Latest" state. skipping...
Exception state (sv=0x00A58A00)
PC=0x9000AF48; MSR=0x0000F030; DAR=0x276E0000; DSISR=0x42000000; LR=0x9000AE9C; R1=0xBFFFE900; XCP=0x00000030 (0xC00 - System call)

Kernel version:
Darwin Kernel Version 8.11.0: Wed Oct 10 18:26:00 PDT 2007; root:xnu-792.24.17~1/RELEASE_PPC
panic(cpu 0 caller 0xFFFF0003): 0x300 - Data access
Latest stack backtrace for cpu 0:
Backtrace:
0x000954F8 0x00095A10 0x00026898 0x000A8204 0x000ABB80
Proceeding back via exception chain:
Exception state (sv=0x2FFBA780)
PC=0x2FBABD3C; MSR=0x00009030; DAR=0x3071434E; DSISR=0x40000000; LR=0x2FBABD24; R1=0x174CBAE0; XCP=0x0000000C (0x300 - Data access)
Backtrace:
0x2FBAD6C4 0x2FBAC82C 0x2FBA7D5C 0x2FB94C74 0x002E9A80 0x002EB94C
0x0008C248 0x00029234 0x000233F8 0x000ABEAC 0x02173140
backtrace terminated - frame not mapped or invalid: 0xBFFFE900

Kernel loadable modules in backtrace (with dependencies):
com.apple.GeForce(4.1.8)@0x2fb89000
dependency: com.apple.iokit.IOPCIFamily(1.7)@0x27620000
dependency: com.apple.iokit.IOGraphicsFamily(1.4.2)@0x2f503000
dependency: com.apple.iokit.IONDRVSupport(1.4.2)@0x2c0b1000
dependency: com.apple.NVDAResman(4.1.8)@0x307d6000
Exception state (sv=0x0Model: PowerMac8,1, BootROM 5.2.2f4, 1 processors, PowerPC G5 (3.0), 1.8 GHz, 1 GB
Graphics: GeForce FX 5200, GeForce FX 5200, AGP, 64 MB
Memory Module: DIMM0/J4000, 1 GB, DDR SDRAM ECC, PC3200U-30330
Modem: Jump, V.92, Version 1.0
Serial ATA Device: WDC WD800JD-40GBB2, 74.53 GB
Parallel ATA Device: MATSHITADVD-R UJ-825
USB Device: Hub in Apple Pro Keyboard, Mitsumi Electric, Up to 12 Mb/sec, 500 mA
USB Device: Trackball, Logitech, Up to 1.5 Mb/sec, 100 mA
USB Device: Apple Pro Keyboard, Mitsumi Electric, Up to 12 Mb/sec, 250 mA

B&W G3 & iMac G5, Mac OS X (10.4.11), iPod Touch

Posted on Apr 5, 2009 7:54 AM

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Answer 1

Apr 7, 2009 8:18 AM in response to imjafj

Hi,

i noticed your post only today. sorry for the problems you have.
if i understand well, you changed the PSU against another new one. Did you check the behaviour of the LEDs on the Logic board? Probably you know about this, but here is the Apple link:

http://support.apple.com/kb/HT2831

also, you might want to check whether you iMac LB and PSU are subject to the typical failure of the G5 family: leaking capacitors. Here is a website which helped me:

http://jimwarholic.com/2008/11/apple-imac-g5-power-supply-issues-and.php

check the capacitors on the LB, and also those in the PSU. If they look bad (for comparison, have a look at the pictures in jim warholic's page) they might be the source of your problems.

I am not able to replace capacitors, but adding one to the 3V pins of the PS cured my problems.

Oh, i must add: kernel problems hint to the LB rather than to the PSU. but the basic problem, bad (underdimensioned) capacitors is the same in both cases.

Hope this helps

Thomas

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Answer 2

imjafj Author

Level 1

12 points

Apr 7, 2009 5:47 PM in response to Thomas Bauer

Thomas,

Thanks, I hadn't seen those links. The LEDs check out ok.
The capacitors also all look normal on the LB. I had hoped maybe that was the problem, even though I don't know how to solder on there.

Jeff

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Answer 3

Apr 8, 2009 12:51 AM in response to imjafj

Hi, Jeff,

Kernel panics is usually a LB problem. and if the led's look ok, then the PS might be not the cause. (though i had it that only the first LED was on, and apple says, that it is the LB, and not the PS, but in my case it was the PS...)

your case is a bit puzzling since you started with an aging PS, and after replacing the PS, you got the kernel panics. but i'm sorry, i'm not good on this subject...

i suggest you try to post again, or try to search this forum for KP.

hope you find a solution.

Thomas

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