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View Full Version : Reseating processors on 2003 (?) Powermac G5




thejaffinator
May 29, 2013, 04:56 AM
So, recently I've been having problems with the fans on my G5 going mad and I keep getting sudden kernel panics, so i reckon that there may be a huge build-up of dust under the heatsinks that keeps causing the processors to overheat. However, i ran ASD and it came out with everything being fine. Still, I have my suspicions and want to reseat the processors. However, I'm not really sure what model I have, as looking up the serial number on Apple's website reveals this page: http://support.apple.com/kb/SP96 This page only lists three models, and my G5 is none of these since it's a 1.8Ghz dual core, when there are only a 1.8Ghz single or a 2Ghz dual on the website.

Does anyone else know what model this may be, as i can't seem to find any tutorial for reseating its processors? Furthermore, does anyone know how to reseat the processors from the picture below?

http://upload.wikimedia.org/wikipedia/commons/thumb/1/1a/Power_Mac_G5_open.jpg/220px-Power_Mac_G5_open.jpg



Nameci
May 29, 2013, 07:40 AM
So, recently I've been having problems with the fans on my G5 going mad and I keep getting sudden kernel panics, so i reckon that there may be a huge build-up of dust under the heatsinks that keeps causing the processors to overheat. However, i ran ASD and it came out with everything being fine. Still, I have my suspicions and want to reseat the processors. However, I'm not really sure what model I have, as looking up the serial number on Apple's website reveals this page: http://support.apple.com/kb/SP96 This page only lists three models, and my G5 is none of these since it's a 1.8Ghz dual core, when there are only a 1.8Ghz single or a 2Ghz dual on the website.

Does anyone else know what model this may be, as i can't seem to find any tutorial for reseating its processors? Furthermore, does anyone know how to reseat the processors from the picture below?

Image (http://upload.wikimedia.org/wikipedia/commons/thumb/1/1a/Power_Mac_G5_open.jpg/220px-Power_Mac_G5_open.jpg)

1.8 GHz dual processor...

thejaffinator
May 29, 2013, 11:47 AM
Umm... Yeah. On the bottom bit with the serial number and stuff it says '1.8Ghz DP', and there are clearly two processors...

thejaffinator
Jun 2, 2013, 06:08 AM
Ok, so now I REALLY need to reseat these processors.

This morning I started it up, it said 'Mac OS X has encountered a problem and needs to shut down' (I know thats for Windows but whatever), so I shut it down and unplugged it. I left it for 5 minutes and it just started normally, but when it displayed the error report i noticed that under 'No. of CPUs' it said 1, not 2. Now I'm pretty sure that this thing is a dual core, mainly by the fact that it has two separate heatsinks. There are 3 T15 screws around each, and there is a Philips screw down the side of each that needs a <20cm long screwdriver to get to. I managed to undo all 4, but it still seems to be connected somewhere in the middle and it's just not budging.

I could get the serial number if it's helpful, but I have no idea what is holding these heatsinks in. I desperately need to reseat these processors, because so far its refusing to run both. Any ideas?

thejaffinator
Jun 2, 2013, 12:29 PM
Here's the latest crash report after spending an hour of running diagnostics, resetting PMU and PRAM, etc...

Interval Since Last Panic Report: 1766 sec
Panics Since Last Report: 1
Anonymous UUID: FEBCB730-C5BF-4340-8BDE-BB575C76FEBB

Thu Jan 1 01:00:29 1970


Unresolved kernel trap(cpu 1): 0x300 - Data access DAR=0x0000000000000000 PC=0x0000000000319100
Latest crash info for cpu 1:
Exception state (sv=0x3b3b4500)
PC=0x00319100; MSR=0x00009030; DAR=0x00000000; DSISR=0x42000000; LR=0x0031ACE0; R1=0x3E653B10; XCP=0x0000000C (0x300 - Data access)
Backtrace:
0x0032058C 0x0033C988 0x00341C30 0x00341914 0x00343670 0x00348E4C
0x0034A02C 0x0034BEDC 0x0034AFFC 0x000B1DD4
Proceeding back via exception chain:
Exception state (sv=0x3b3b4500)
previously dumped as "Latest" state. skipping...
Exception state (sv=0x3b3b6280)
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 9.8.0: Wed Jul 15 16:57:01 PDT 2009; root:xnu-1228.15.4~1/RELEASE_PPC
System model name: PowerMac7,2

System uptime in nanoseconds: 13576559488
unloaded kexts:
(none)
loaded kexts:
com.apple.driver.AppleFileSystemDriver 1.1.0 - last loaded 435202171
com.apple.iokit.IOUSBHIDDriver 3.4.6
com.apple.driver.AppleUSBMergeNub 3.5.2
com.apple.driver.PioneerSuperDrive 2.0.9
com.apple.iokit.SCSITaskUserClient 2.1.1
com.apple.driver.XsanFilter 2.7.91
com.apple.iokit.IOATABlockStorage 2.0.6
com.apple.iokit.IOATAPIProtocolTransport 1.5.3
com.apple.driver.AppleUSBHub 3.4.9
com.apple.iokit.IOUSBUserClient 3.5.2
com.apple.driver.ApplePMU 2.5.6d2
com.apple.driver.AppleK2SATA 1.0.4f2
com.apple.driver.AppleGPIO 1.3.0d0
com.apple.driver.AppleVIA 1.5.1d1
com.apple.driver.MacIOGPIO 1.3.0d0
com.apple.driver.AppleUSBEHCI 3.4.6
com.apple.driver.AppleK2SATARoot 1.0.5b1
com.apple.driver.AppleFWOHCI 3.9.7
com.apple.driver.AppleKauaiATA 1.2.1f4
com.apple.driver.AppleUSBOHCI 3.4.6
com.apple.driver.AppleK2 1.7.2f1
com.apple.driver.AppleCPUThermo 2.0.0a0
com.apple.driver.AppleMPIC 1.5.3
com.apple.driver.AppleI2C 4.0.0d2
com.apple.driver.AppleSPU 2.5.6d2
com.apple.driver.AppleMacRiscPCI 3.4.0
com.apple.driver.AppleCore99NVRAM 1.1.1
com.apple.driver.AppleFlashNVRAM 1.0.5
com.apple.security.seatbelt 107.12
com.apple.nke.applicationfirewall 1.8.77
com.apple.security.TMSafetyNet 3
com.apple.BootCache 30.4
com.apple.driver.AppleMacRISC4PE 2.0.4d9
com.apple.driver.AppleUSBComposite 3.2.0
com.apple.iokit.IOSCSIMultimediaCommandsDevice 2.1.1
com.apple.iokit.IOBDStorageFamily 1.5
com.apple.iokit.IOSCSIBlockCommandsDevice 2.1.1
com.apple.iokit.IODVDStorageFamily 1.5
com.apple.iokit.IOCDStorageFamily 1.5
com.apple.iokit.IOStorageFamily 1.5.6
com.apple.iokit.IOSCSIArchitectureModelFamily 2.1.1
com.apple.iokit.IOFireWireFamily 3.4.9
com.apple.iokit.IOATAFamily 2.0.1
com.apple.iokit.IOUSBFamily 3.5.2
com.apple.iokit.IOKeyLargo 1.7.2f1
com.apple.iokit.IOHIDFamily 1.5.5
com.apple.driver.IOPlatformFunction 1.8.7d5
com.apple.iokit.IOPCIFamily 2.6
panic(cpu 1 caller 0xFFFF0003): 0x300 - Data access
Latest stack backtrace for cpu 1:
Backtrace:
0x0009CC88 0x0009D63C 0x00029DA0 0x000B0A10 0x000B4278
Proceeding back via exception chain:
Exception state (sv=0x3b3b4500)
PC=0x00319100; MSR=0x00009030; DAR=0x00000000; DSISR=0x42000000; LR=0x0031ACE0; R10


Any help at all? Tomorrow morning, this wont start up again, and I don't know what I'll have to go through to get it back to working order again, because it just seems to be getting worse.

Hrududu
Jun 2, 2013, 07:22 PM
There really isn't anything special or hard about re-seating the CPU's in a G5. As long as you've got a screwdriver long enough to reach down to disconnect them, you're good.

thejaffinator
Jun 3, 2013, 12:53 PM
Trust me, i have all the necessary screwdrivers, and this isn't working at all. Maybe this will make it more clear:

https://s3-eu-irl-107-prod.digitalhub.com/CAEQARoQnD2DD6PPjcsDE5l5ebqOxA/01a41c996179d804aa51bef11b1d435abb9e412816/img_0001.jpg+%282%29.jpg?v=0&p=1&x=1&a=A7Y8Fdvlk46W4XUb&e=1370282918000&r=52d47d3b-b85a-47d0-9041-5afa6aa44a61-1&c=CroECpgECrsDCiFtc2R1YjAwMDAyMy5ibG9iLmNvcmUud2luZG93cy5uZXQQUBoDR0VUIpkBL2NudC9oV1FzaHA0QlB3c25Cdn NBbWgzcz9zcD1yJnNyPWImYnl0ZS1yYW5nZT01NC02Mzc2NTcmc2U9MjAxMy0wNi0wM1QxODo0Mlomc3Q9MjAxMy0wNi0wM1QxNz o0N1omc2lnPWJDTmVxYnIyZW5WV3A3dUFXVFAySWpxb1R1TEFKZzlYZyUyRjJLV2tJJTJCbExVJTNEKgRIVFRQMgMxLjE6BGh0dH BCGAoFUmFuZ2USD2J5dGVzPTU0LTYzNzY1N0I-ChZ4LW1zLWNsaWVudC1yZXF1ZXN0LWlkEiQ1MmQ0N2QzYi1iODVhLTQ3ZDAtOTA0MS01YWZhNmFhNDRhNjFCGwoOeC1tcy1ibG9i LXR5cGUSCUJsb2NrQmxvYkIaCgx4LW1zLXZlcnNpb24SCjIwMTItMDItMTJCKgoJeC1tcy1kYXRlEh1XZWQsIDIyIE1heSAyMDEz IDIzOjAyOjIxIEdNVEINCgZBY2NlcHQSAyovKkoJbXNfZXVfZHViUglzM19ldV9pcmwSMAoVgf5PA2U3_aSM1hwzscVegm6DXC4I EhEBxjnyT5z8VwkZKEUrIRm5Vhik9SYgABoUaFdRc2hwNEJQd3NuQnZzQW1oM3MiEEF5VDA0elVMRkRyK1JYWWISHQoVAaQcmWF5 2ASqUb7xGx1DWrueQSgWEgQIABAAIAI&s=Ha6OVdRVzjoD1_RJjxbVX6vuN00

All the red circles are T15 screws. The blue ones are the Philips screws down the side, and the green ones are the other Philips screws next to those that connect to the processor in some way that seems like they're not connected at all. After disconnecting these, I can tilt the heatsinks towards the RAM, but this also moves the processor underneath, which is still attached.

Does this make it in any way clearer? I have no idea where any other screws may be.