I have an iBook G4, 1.33Ghz, 14.1"

Couple days ago, it started freezing up and this gray window of "press the power button for few secs to shutdown" in 4 languages. I did that and then it stopped booting, instead this message keeps showing. I tried nvram thing and was able to get it to load.

I backed everything up and wipe the drive clean and re-install 10.5.4

Started back up OK for a few hours, then I get this message again. I was able to boot - go straight to Open Formware etc... had to do the reset nvram

I was able to boot and copied the error message below. Can some shed some light? Need it for homework...... :-(

Sorry for the long message. I know it's going to cost a fortune to take it to a shop. Hopefully I can get some help and resolve the issue.

Thank you!

Wed Oct 28 12:50:52 2009
panic(cpu 0 caller 0x000AED04): "Uncorrectable machine check: pc = 0000000000BE55D8, msr = 0000000000149030, dsisr = 40000000, dar = 0000000013201FF8\n" " AsyncSrc = 0000000000000000, CoreFIR = 0000000000000000\n" " L2FIR = 0000000000000000, BusFir = 0000000000000000\n"@/SourceCache/xnu/xnu-1228.5.20/osfmk/ppc/trap.c:975
Latest stack backtrace for cpu 0:
0x0009B498 0x0009BE3C 0x00029DD8 0x000AED04 0x000AEF84 0x000B2A78
Proceeding back via exception chain:
Exception state (sv=0x13172500)
PC=0x00BE55D8; MSR=0x00149030; DAR=0x13201FF8; DSISR=0x40000000; LR=0x00BE9824; R1=0x131AF9C0; XCP=0x00000008 (0x200 - Machine check)
0x131AFAC8 0x00BE9824 0x00BEA308 0x00C1F6A0 0x00BDC7E4 0x00BDCCBC
0x0034380C 0x00344960 0x00346810 0x00345930 0x000B05D4
Kernel loadable modules in backtrace (with dependencies):
com.apple.driver.AirPortBrcm43xx(314.46.9)@0xbd200 0->0xcfefff
dependency: com.apple.iokit.IO80211Family(211.1)@0xbae000
dependency: com.apple.iokit.IOPCIFamily(2.4.1)@0x7a5000
dependency: com.apple.iokit.IONetworkingFamily(1.6.0)@0xb4d000
Exception state (sv=0xd139280)
PC=0x00000000; MSR=0x0000D030; DAR=0x00000000; DSISR=0x00000000; LR=0x00000000; R1=0x00000000; XCP=0x00000000 (Unknown)

BSD process name corresponding to current thread: kernel_task

Mac OS version:
Not yet set

Kernel version:
Darwin Kernel Version 9.4.0: Mon Jun 9 19:36:17 PDT 2008; root:xnu-1228.5.20~1/RELEASE_PPC
System model name: PowerBook6,7