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lenovo workstation keeps rebooting

Hi

My client has a duo core Lenovo (87057LG) which was factory installed with XP
and is currently running MailCLeaner (Linux).

Recently the system began rebooting, on its own, and for no apparent reason.

I brought it into our workshop, cleaned it up and ran memtest; the system rebooted during the test.

I swapped the two 1GB memory sticks and ran memtest again; the system rebooted during the test.

I disconnected the hard drive and ran memtest again; the system rebooted during the test.

I replaced the power supply and ran memtest again; the system rebooted during the test.

I replaced the duo core cpu and ran memtest again; the system rebooted during the test.

I'm not sure what to do now apart from binning the system.

Any ideas ?

thanks

yann
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Yann Shukor
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Yann Shukor
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1 Solution
 
Dan CraciunIT ConsultantCommented:
Check the temperatures. Something (CPU, MB) could be overheating and cause the reboot.
When in BIOS, on the temperature report page, stay for a few minutes and watch if temperatures rise.

HTH,
Dan
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nobusCommented:
install speedfan and monitor the cpu and video temperatures :
http://www.almico.com/speedfan.php      

when running diags - check the temperatures in the bios - if they are shown at all

a good way for troubleshooting systems is the minimum setup as described in my article :
http://www.experts-exchange.com/Hardware/Components/Motherboards/A_1945.html                  (Short-overview-of-how-to-troubleshoot-bad-hardware-when-a-pc-does-not-post)

as a bonus, i add the way i handle suspect disks
http://www.experts-exchange.com/Storage/Hard_Drives/A_3000-The-bad-hard-disk-problem.html
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rindiCommented:
I'd agree with the above that the system is probably overheating. Have you checked that the fans are all running freely and smoothly?

Did you make sure that the heatsink was properly and firmly attached to the CPU, and that prior to attaching the heatsink both surfaces were shiny and clean, and that you added a very small drop of thermal transfer paste to the CPU's surface? Did you also make sure that your BIOS was reset to default values, so no overclocking is taking place?
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Yann ShukorOwnerAuthor Commented:
I reset the BIOS settings and observed the CPU and system temperatures.

The system rebooted at  CPU: 37°C and 41°C
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nobusCommented:
ok  - then that does not seem like the cause - unless the GPU is heating up.
did you install speedfan?   what does it list as GPU temp ?
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rindiCommented:
Don't trust the temperature readings the system outputs. Make sure as I mentioned earlier that the heatsinks are properly attached and the fans run smoothly.
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Yann ShukorOwnerAuthor Commented:
Spot on
The heat sink on the GPU was fairly hot, so I removed it, cleaned both surfaces and applied a wee drop of paste and custom-attached a fan on top of the heat sink.
The system is noisier than before, but who cares since it resides in a server room.
So far no reboots. Yes !
thanks nobus
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nobusCommented:
glad to assist, and tx for feedback
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