How do you fix recurrent kernel panic after fsck

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I am at my wit's end to fix my iBook G4's recurring kernel panic problem. I've tried many the suggestions that have been brought up on this forum.

Background: First of all, nothing new is going on with this ancient, but lucky iBook. No new RAM, nothing. No exciting days out in the park, no new friends, etc. MAC OS X Version 10.4.11 1.33 Gz PowerPC G4, 1 G DDR SDRAM.
This is the first time in the four years I've had it that I came across a kernel panic, and now it's happening all the time. Weirdly, they happen soon and sooner after the reboot to the point I barely sign in then it crashes before I open anything.

So far: ran disk utility, repaired permissions. Still crashes. SMART: verified.
Reset PRAM
Used FSCK, said the disk was ok.
Before FSCK, could not start is safe mode. After, can start in safe mode, but if start regularly, get kernel panic (oh why, dear God).

Previously, when the little window came up saying that MAC OS had crashed unexpectedly and asked if I wanted to report, clicking on report brought up no window or log. So nothing to add from that.

Oh, and the memory is a big tight, but a full 1/4 of the space is still available.

Any suggestions are highly highly appreciated. I will starve without the laptop, literally. And that does not look good.
---
Panic log is as follows for the most recent crash (thank you Onyx!):
--
Fri Jul 10 16:50:21 2009
panic(cpu 0 caller 0x000A8C00): Uncorrectable machine check: pc = 00000000006E3038, msr =
0000000000149030, dsisr = 42000000, dar = 00000000E07C7000
AsyncSrc = 0000000000000000, CoreFIR = 0000000000000000
L2FIR = 0000000000000000, BusFir = 00000000000000000

Latest stack backtrace for cpu 0:
Backtrace;
0x000954F8 0x00095A10 0x00026898 0x000A8C00
0x000A7E90 0x000ABB80
Proceeding back via exception chain:
Exception state (sv=0x30F16000)
PC=0x006E3038; MSR=0x00149030; DAR=0xE07C7000; DSISR=0x42000000; LR=0x006E2C10;
R1=0x178A3C70; XCP=0x00000008 (0x200 - Machine check)
Backtrace:
0x00004278 0x0070EEC8 0x0070A828 0x0071F094 0x002D1B8C 0x002D0A54
0x000A9714
Kernel loadable modules in backtrace (with dependencies):
com.apple.iokit.AppleAirPort2(405.1)@0x6e0000
dependency: com.apple.iokit.IONetworkingFamily(1.5.0)@0x60d000
dependency: com.apple.iokit.IOPCIFamily(1.7)@0x48d000
PC=0x00000000; MSR=0x0000D030; DAR=0x00000000; DSISR=0x00000000; LR=0x00000000; R1=0x00000000; XCP=0x00000000 (Unknown)
--
Could it be my airport?/ I tried to google the gibberish above but couldn't figure it out. Please help!
 
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Your Mac's Specs
20" Intel iMac 2.4 Ghz/3G Ram/320HD, Snow Leopard. PBook G4, 1.5Ghz/1.5 Ram/250 HD, Leopard 10.5.6.
This looks like there is an issue with airport yes. I would remove the Airport card and see how it runs without.
To be sure I'd run disk utility again and try fsck once you have done so.
Have you run a hardware test?
 
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how to fix airport?

I might be wrong, but it looks like this ancient ibook has the integrated airport? Unscientifically, I turned on the computer normally, turned off the airport, opened eight programs...it was fine and stable for an hour. As soon as I turned the airport on, within five seconds I had a kernel panic.

I do not have the Apple Hardware Test Cd. I saw from The Apple Hardware Test that I could use Techtools(a bit too pricey!). Am downloading Rember to run a RAM test. Will search further for other hardware tests, suggestions appreciated!

I am willing to take the computer apart, but am a bit afraid of 'soldering' anything.

If it is the airport, how do I know if I have to do the paper fix?--http://www.instructables.com/id/Fixing_a_broken_iBook_G4_with_Airport_kernel_panic/

Thanks so much!
 
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Your Mac's Specs
20" Intel iMac 2.4 Ghz/3G Ram/320HD, Snow Leopard. PBook G4, 1.5Ghz/1.5 Ram/250 HD, Leopard 10.5.6.
Ok, from memory I the built in airport cards on these machines used to overheat, due to being close to the heatsink.
I looked at that article, and while it solves the problem, it's not easy! All that soldering requires patience and skill.
Just one thing. Have you updated the Airport software recently? Are you running the most up to date version, as there are sometimes issues with compatabilty there.
I don't think your RAM is an issue, but no harm in checking.
 
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I wanted to update for people who may have this problem in the future. I have turned off my Airport (and bundled bluetooth), bought a new USB wifi stick ($80) and the kernel panic problem is gone. Talking with Apple folks, this is clearly a known and common issue. My iBook G4 is a later model--it is not easy to pop out the airport card. Clearly, it's time for me to upgrade this laptop, but I like to squeeze all the juice out of my electronics before moving on. Also for other newbies like myself--apparently you can send stuff on to Apple's depot and get everything fixed for $350 regardless of time, parts and labor. Good thing if something big has blown. Thanks to all who helped, especially Kevriano. It's less stressful when you have company trying to figure things out.
 
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Your Mac's Specs
20" Intel iMac 2.4 Ghz/3G Ram/320HD, Snow Leopard. PBook G4, 1.5Ghz/1.5 Ram/250 HD, Leopard 10.5.6.
Glad you found a suitable solution. It seems silly to dispose of a usable machine because of a silly design flaw that can be overcome. $350 is ridiculous! You could get another iBook for that. I hope it keeps going and you don't suffer the dreaded logic board failure iBooks are prone to. (I think you'll be fine, as you have a later model).
Thanks for the thanks and for the update.
 

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