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9860 bad cpu temp sensor?

post #1 of 5
1/10/09 at 4:27am
Thread Starter 
Hi all, love these forums in a pinch!

sager np9860 3.0ghz w/ continuous fan bios.

Just recently it has been shutting down because of overheating while idling or doing low cpu intensive tasks. I cleaned out the fans and it only seemed to make the problem worse. I reflashed the bios to the latest I can find (1.05b if I remember right) and didnt solve anything. I set it to automatic and that seems to help, but sometimes I will still shut down, wait a minute and then run the fans on full for 30 seconds then shut turn off.

This only seems to happen when the temperature gets below 45-38C and both fans have shut off. I have moboMeter running and sometimes when both fans shut off it will read 1C, and the fans wont turn back on until it does its overheat shutdown procedure.

But all in all its very erratic! I am kind of stuck at this point.

If the cpu temp is bad, wouldnt it just go out completely?
Also, is it located on the heat sink or internally from the cpu?


Thanks for ANY advice!



The sager is, damn, 4 years old now and has not given me too many problems. Just a bad ram stick, batts dead, and had to get a new power brick (at the worst possible time). But this is something that I cant deal with.
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post #2 of 5
1/22/09 at 3:58am
Thread Starter 
Can anyone help with this? Its happening every time I start up now and beginging to corrupt my files for the perpetual shutdowns.
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post #3 of 5
1/22/09 at 11:42am
I'm not too familiar with that model but it may be worth just checking the thermal paste on the CPU and replacing it to be sure.

If you've done that and are convinced the temperature sensor is bad you may be able to turn off the protection in the BIOS....risky but it's an old computer and you don't have much to lose. If you can't do it in the BIOS download and install rightmark CPU clock utility and try to turn it off from within that program. It also gives you more control over the CPU and thermal protection features.

The other option is to replace the CPU and see if the problem follows. Not an ideal solution but you might have a bad CPU.

Be sure to check all your other components, especially your RAM to make sure the problem doesn't lie elsewhere. Use memcheck 86 to test your RAM from a boot disk.
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post #4 of 5
1/24/09 at 5:28am
Thread Starter 
Thanks, Im not sure its the temp sensor itself, but maybe some bug in the bios. In any case Im going to replace the thermal paste and really clean out the heat sink as a next step.

I got a reply from sager tech support, and they state that there are 3 temp sensors between the motherboard and gpu (so replacing the CPU wont fix the problem).

Opening up the back panel Ive found one temp sensor attached to the heat sink, if I can find out if thats the problem one, I might have a fix.

To be continued...
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post #5 of 5
8/19/09 at 5:30pm
Quote:
Originally Posted by 472 View Post
Thanks, Im not sure its the temp sensor itself, but maybe some bug in the bios. In any case Im going to replace the thermal paste and really clean out the heat sink as a next step.

I got a reply from sager tech support, and they state that there are 3 temp sensors between the motherboard and gpu (so replacing the CPU wont fix the problem).

Opening up the back panel Ive found one temp sensor attached to the heat sink, if I can find out if thats the problem one, I might have a fix.

To be continued...
HI:
I'm having the same issue, did you get to know where are the thermal sensors?
I made a test, when the correct temperature was showing itself (using MobMeter) I unplugged the sensor that lays in the heatsink and nothing chances, in other words, the correct temperture continues to be shown even when I disconnected that sensor.
I want to know if is possible to change the thermal sensor.
Thanks
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