Having problems with your Dell Dimension 8300 PC Desktop ?

Dell Dimension 8400 locks up after 15 - 20 minutes of use it doesn't matter the applications that are running. The start button must be pressed and held for a few seconds to power down the unit. It will restart normal, but will lock up again.

Answers :

Sounds like an overheating problem to me. Try taking off the side of the case, and starting the unit. Pay close attention to the fans that you can see. leave the computer running, and continue to check the fans. If a fan is going bad, not working, or going to slow, then the processor will overheat, and shut off the computer. Bad fans are easy to replace, just make sure you get the right size, with the right plug. This is just one possible reason for your problem, a further troubleshooting of the unit is needed...possible bad RAM, or video card failure can cause this mysterious shut down.
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