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Old 12-24-2007, 04:08 PM   #1
WoodLark
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Question Computer shuts down


I have a tower computer that is currently running RLinux/Openfiler as a file server. About two months ago, it started shutting down and was hard to restart. On investigation, I discovered that the hard drive was not working properly (wouldn't spin up)so it was replaced. At the same time, I replaced the power supply with a heavier duty one with two fans. For the past two months it has been working fine.

Day before yesterday, it shut down again. It would not restart until I removed the power cord for several seconds. After restarting it would run a little while then shut down again. Yesterday, I opened the case and found that the CPU fan had seized up. Luckily I had a new spare fan and heat sink so I replaced them.

Everything appeared to be working so I put the system back in service. About an hour later, it shut down again. I won't have time to work on it again until next weekend, but my thoughts at this point are:

a. The new power supply is defective
or
b. The CPU was permanently damaged by heat when the fan seized.

Any other suggestions?

Also, I don't know whether I should keep pouring money and time into trying to fix this system or should I just start looking for a replacement.
 
Old 12-24-2007, 04:25 PM   #2
{BBI}Nexus{BBI}
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Try running it with the side cover off. If it doesn't shutdown, you need to install extra fans to keep the inside cool with the side on.
 
Old 12-24-2007, 04:43 PM   #3
marvinudy
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WoodLark,

Make sure your cpu heatsink/fans are properly seated on the cpu or you will get cpu temperature shutdowns. Remove the heatsink from the cpu and look at the pattern of paste on the cpu. It should be uniform and distributed evenly over the cpu top. Would suggest you use one of the silver compounds for best results.

Best regards,

marvinudy
 
Old 12-28-2007, 11:51 AM   #4
WoodLark
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I think I found the problem! When I opened the case, the CPU heat sink and fan were lying on the bottom of the case. On close examination, I found that the center tab on the back side of the CPU socket was defective. The original heatsink clip used the two outside tabs on each end of the socket, but the replacement used the center tabs. Luckily, I hadn't thrown out the old heatsink so I removed its clip and installed it on the new heatsink and put it back in place (with new silver thermal compound). It has been running about half an hour now so we'll see if the problem is solved (fingers crossed). Thanks for the helpful suggestions!
 
Old 12-28-2007, 12:30 PM   #5
onebuck
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Hi,

Quote:
Originally Posted by WoodLark View Post
I think I found the problem! When I opened the case, the CPU heat sink and fan were lying on the bottom of the case. On close examination, I found that the center tab on the back side of the CPU socket was defective. The original heatsink clip used the two outside tabs on each end of the socket, but the replacement used the center tabs. Luckily, I hadn't thrown out the old heatsink so I removed its clip and installed it on the new heatsink and put it back in place (with new silver thermal compound). It has been running about half an hour now so we'll see if the problem is solved (fingers crossed). Thanks for the helpful suggestions!
Your lucky day!
 
  


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