Get Temperature Monitor to see if it's heat related...
And/or iStat Pro...
If you have any temps in the 70°C/160°F range, that's likely it.
Hi again BD
I have both Temperature Monitor, and Rember.
Where would I look for a temp of 160F? Which component?
I've read numerous posts. It may be a bad Power Supply. But it never gave me any issues before. Mystery ....
I put the old Maxtor HD back in the bottom slot, using it for storage. It was the original system drive. An old 160GB Maxtor. Wonder if it could be the culprit? Could a bad 2nd drive cause such a shut down?
Thank you BD
Adding to the data:
Nov 18 21:45:15 localhost kernel: Matching service count = 6
Nov 18 21:45:15 localhost kernel: IOPlatformControl::registerDriver Control Driver AppleSlewClock did not supply target-value, using default
Nov 18 21:45:16 localhost kernel: UniNEnet: Ethernet address 00:0a:95:a7:8b:86
Nov 18 21:45:16 localhost diskarbitrationd: disk0s3 hfs 687E9963-BDC1-3ECF-A88A-B85609E1E579 Suz System Drive /
Nov 18 21:45:16 localhost launchd: Server 372b in bootstrap 1103 uid 0: "/usr/sbin/lookupd": exited abnormally: Hangup
Nov 18 21:45:16 localhost kernel: ApplePMU::PMU forced shutdown, cause = -122
Nov 18 21:45:16 localhost lookupd: lookupd (version 369.8) starting - Sun Nov 18 21:45:16 2012
Nov 18 21:45:19 localhost mDNSResponder: Adding browse domain local.
Nov 18 21:45:23 localhost kernel: ATY,Apache_A: vram [c0000000:10000000]
Nov 18 21:45:23 localhost kernel: ATY,Apache_B: vram [c0000000:10000000]
Nov 18 21:45:23 localhost /System/Library/CoreServices/loginwindow.app/Contents/MacOS/loginwindow: Login Window Application Started
Nov 18 21:45:24 localhost loginwindow: Login Window Started Security Agent
Could a bad 2nd drive cause such a shut down? *See above ...
"Also, is it connected to a UPS?"
Hi BD, that 2nd drive is in the bottom bay connected as per the standard G5 cables, sata, & power. I've disconnected that drive, and will put the machine thru some additional paces. We'll see what happens? However, I'm starting to have my doubts - I think it's the power supply? Just odd that it would suddenly give out ...
I think if that 2nd drive were bad, there would some error messages.
The PMU forced shutdown error message log tells you that it is likely a hardware issue, as opposed to software, that is causing the forced shutdown.
BDAquas mention of the UPS is of importance, as dirty power can also cause a PMU forced shutdown. A UPS cleans up and backs up the power for the machine.
I would remove the old hard drive simply to rule it out as a source of trouble.
The PSU could also be overheating due to dust accumulation. The G5 PSU is good at sucking in dust, but terrible at allowing the dust to leave or be removed.
Overheat due to dust could cause faltering of power supplied, thus resulting in the PMU forced shutdown.
Compressed air is one way people get the dust out. Disassembly is the most sure way.
Oh, and don't rule out failing PSU fans.....
Hi again Chris
Yes, I'll disconnect the 2nd drive just to rule it out, (I have my doubts). And I usually clean the all cooling fins with a compressor. Oh and BTW, all the fans are running at what appear to be 'idle speed'. Is there some point at which they rev up as the CPU heats up? If so, I haven't witnessed that at temps about 125F. Enlighten me. Thank you Chris.
The PSU has no sensors, temperature or RPM. Only visual, physical confirmation of function can confirm the fans are working.
As for dust, the PSU is unlike the fins on the heatsink. It is an enclosed box, where air moves over the PSU components and heatsink from one end to the other, with dust accumulation points all along the entire length of the PSU being had around board components and the internal heatsink.
The PSU is very hard to clean and contains no monitoring capability.
"The PSU is very hard to clean and contains no monitoring capability."
Chris, I can do this, I can remove the cover. Just need a few tips. Do you have a procedure for this on your Web Site?
BTW - I actually seem to be getting somewhere with regard to stability, after more than 4 hours of running time. I'll be forwarding some data, standby....
Latest Data: Machine on for approx. 4 hours, multiple applications open. Monitored temperature ranges for each application. No system shut downs, (not yet). What's different? I disconnected the 2nd internal drive. Blew out the cooling fins with compressor. (See above question).
FC6 CPUA Temp 117-120F
Sound Track Pro 2.0.2 CPUA Temp 118-124F
Garage Band 08 4.1.2 Temp 118-124F
Other applications open were After Effects 7, and Microsoft Word 2004.
Memory Heatsink = 127F
Main Logic Board = 98.2F
Backside = 102F
Activity Monitor showed system memory, 1/3 Used, (Blue), 2/3 Free (Green)