OS X 10.4.10 Error Message - "you must restart this computer ..."

Question

Hello. I've started up my Powerbook G4 twice and have received a message stating "You must restart this computer..." with instructions to hold down start button to do so. I've had this unit for nearly 5 years with no issues. Am not running any external equipment. I've read that it may be a "Kernal Panic". What is this? I was instructed by a particular posting to record the "panic log". Could someone instruct me further as to my best possible solution? Here are the specifics on my unit and the text from the "panic log"
Machine Name: PowerBook G4 12"
Machine Model: PowerBook6,1
CPU Type: PowerPC G4 (3.3)
Number Of CPUs: 1
CPU Speed: 867 MHz
Memory: 640 MB
** Panic Log Text Begins Here **
Wed Jan 2 18:54:01 2008
panic(cpu 0 caller 0x000A8A00): Uncorrectable machine check: pc = 00000000008D0468, msr = 0000000000149030, dsisr = 42000000, dar = 0000000019B953DC
AsyncSrc = 0000000000000000, CoreFIR = 0000000000000000
L2FIR = 0000000000000000, BusFir = 0000000000000000
Latest stack backtrace for cpu 0:
Backtrace:
0x000952D8 0x000957F0 0x00026898 0x000A8A00 0x000A7C90 0x000AB980
Proceeding back via exception chain:
Exception state (sv=0x2405F000)
PC=0x008D0468; MSR=0x00149030; DAR=0x19B953DC; DSISR=0x42000000; LR=0x008A9428; R1=0x0F993D80; XCP=0x00000008 (0x200 - Machine check)
Backtrace:
0x00032D00 0x008A9428 0x0003C884 0x000A9514
Kernel loadable modules in backtrace (with dependencies):
com.apple.iokit.AppleAirPort2(405.3)@0x8a6000
dependency: com.apple.iokit.IONetworkingFamily(1.5.0)@0x5c2000
dependency: com.apple.iokit.IOPCIFamily(1.7)@0x48c000
Exception state (sv=0x23C4C000)
PC=0x00000000; MSR=0x0000D030; DAR=0x00000000; DSISR=0x00000000; LR=0x00000000; R1=0x00000000; XCP=0x00000000 (Unknown)
Kernel version:
Darwin Kernel Version 8.10.0: Wed May 23 16:50:59 PDT 2007; root:xnu-792.21.3~1/RELEASE_PPC
Wed Jan 2 19:05:21 2008
panic(cpu 0 caller 0x000A8A00): Uncorrectable machine check: pc = 00000000008D04F0, msr = 0000000000149030, dsisr = 40000000, dar = 00000000E027A2D8
AsyncSrc = 0000000000000000, CoreFIR = 0000000000000000
L2FIR = 0000000000000000, BusFir = 00000000fff00000
Latest stack backtrace for cpu 0:
Backtrace:
0x000952D8 0x000957F0 0x00026898 0x000A8A00 0x000A7C90 0x000AB980
Proceeding back via exception chain:
Exception state (sv=0x2EEF1280)
PC=0x008D04F0; MSR=0x00149030; DAR=0xE027A2D8; DSISR=0x40000000; LR=0x008A9428; R1=0x0F963D80; XCP=0x00000008 (0x200 - Machine check)
Backtrace:
0x0038DFCC 0x008A9428 0x0003C884 0x000A9514
Kernel loadable modules in backtrace (with dependencies):
com.apple.iokit.AppleAirPort2(405.3)@0x8a6000
dependency: com.apple.iokit.IONetworkingFamily(1.5.0)@0x5c2000
dependency: com.apple.iokit.IOPCIFamily(1.7)@0x48c000
Exception state (sv=0x00D07000)
PC=0x00000000; MSR=0x0000D030; DAR=0x00000000; DSISR=0x00000000; LR=0x00000000; R1=0x00000000; XCP=0x00000000 (Unknown)
Kernel version:
Darwin Kernel Version 8.10.0: Wed May 23 16:50:59 PDT 2007; root:xnu-792.21.3~1/RELEASE_PPC
** End Panic Log Text **
Thanks
Edward C

Answer 1

Edward:
Welcome to Apple Discussions.
You are, indeed, having a kernel panic (your computer, that is )
From the panic log you posted my guess is that your Airport card is the culprit. I suggest that you remove the Airport Express card and then try starting up again. If all goes well, clean off the contacts of the Airport card and replace it and see what happens. If the KPs return, you will need to replace the Airport card with a new one.
Please do post back with further questions or with an update.
Cheers
cornelius