March 16th, 2008, 12:20 AM #1
System sporadically freezes
I have an iBook G4, Tiger edition 10.4.11, 1.07 GHz, 768 MB DDR SDRAM.
My system sporadically freezes. Whenever it is moved (i.e. resituated on my lap, or from my lap to the table). Or if I leave it unattended for a period of time (i.e. downloading something, and walk away, by the time I come back it's froze if I am not constantly DOING something). Or if I try to access 3 or 4 applications at a single time.
Sometimes the freeze is a complete system freeze where nothing works or moves. Sometimes everything but the mouse freezes and I can still move the black arrow around. Sometimes it freezes and the little beach ball just keeps spinning, but is still mobile.
Sometimes after it freezes it will not restart. Instead it goes to a screen where it is all white with black flashing horizontal lines.
Sometimes a screen will pop up and say simply "You need to restart your computer. Please hold down the power key."
The only thing that I've found that fixes the screen is to take out the battery for 5-10 seconds and then it restarts immediately and perfectly.
I've done my "google" research and found that the early G4's (which mine is) have issues with the logic board and my Mac showed similar symptom's. It also said the "clamp" method temporarily fixes the problem. I tried this and it did nothing but readjust the black flashing lines. It did not fix the problem.
I've tried completely reformatting my hard drive. Starting from scratch.
I installed an additional 512 MB of RAM on top of the 256 built-in.
I ran Disk Utility to verify and repair permissions.
I installed SMART reporter, and it says that my hard drive is fine.
I ran ClamXav before reformatting my drive and it found nothing. I can't run it now, it freezes before it's finished every time
At the very bottom of this message I've added the error report it sends to Apple sometimes after a freeze.
I've added everything I know of. I hope you can help. I'm baffled. Thank you!
panic(cpu 0 caller 0x000A8C00): Uncorrectable machine check: pc = 000000000086328C, msr = 0000000000149030, dsisr = 40000000, dar = 0000000011DCC040
AsyncSrc = 0000000000000000, CoreFIR = 0000000000000000
L2FIR = 0000000000000000, BusFir = 0000000000000000
Latest stack backtrace for cpu 0:
0x000954F8 0x00095A10 0x00026898 0x000A8C00 0x000A7E90 0x000ABB80
Proceeding back via exception chain:
Exception state (sv=0x26D77000)
PC=0x0086328C; MSR=0x00149030; DAR=0x11DCC040; DSISR=0x40000000; LR=0x0086687C; R1=0x07B7BA50; XCP=0x00000008 (0x200 - Machine check)
0x0166B588 0x0086687C 0x008672C8 0x0085194C 0x002E9A80 0x002EB94C
0x0008C248 0x00029234 0x000233F8 0x000ABEAC 0x01133F60
Kernel loadable modules in backtrace (with dependencies):
Exception state (sv=0x26838500)
PC=0x9000B348; MSR=0x0000F030; DAR=0x0020C00E; DSISR=0x42000000; LR=0x9000B29C; R1=0xBFFFE930; XCP=0x00000030 (0xC00 - System call)
Darwin Kernel Version 8.11.0: Wed Oct 10 18:26:00 PDT 2007; root:xnu-792.24.17~1/RELEASE_PPC
Model: PowerBook6,5, BootROM 4.8.5f0, 1 processors, PowerPC G4 (1.1), 1.07 GHz, 256 MB
Graphics: ATI Mobility Radeon 9200, ATY,RV280M9+, AGP, 32 MB
Memory Module: DIMM0/BUILT-IN, 256 MB, built-in, built-in
AirPort: AirPort Extreme, 405.1 (18.104.22.168.p18)
Modem: Jump, V.92, Version 1.0
Network Service: Built-in Ethernet, Ethernet, en0
Parallel ATA Device: MATSHITACD-RW CW-8123
Parallel ATA Device: Hitachi IC25N060ATMR04-0, 55.89 GB