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Dell Dimension C521 power shuts off spontaneously

\015 While working on my computer, power spontaneously shuts off without warning. I then have to reboot. Compter will operate for 5-10 minutes, and then suddenly shut down again\015

Answers :

It sounds like your power supply fan may be overheating. The easiest way to determine this is to open the case and look at the fan while it is spinning- if it is indeed spinning at all. I find the best way to get an idea of the functionality of the fan is to shine a flashlight on it at an angle. If you can detect fluctuations in the rpm visually, you know where the problem is. Then it's a matter of changing out the power supply. If, however, the fan seems to keep the same rotation speed constantly, we'll need to look further. Let me know what you find out before we go deeper into the system.
Procssor over heat can cause this kind of problem
\015\012check your processor cooler
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