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When I start my computer, it boots well and runs for around 4 mins. After that the monitor automatically switching off and the Processor light on the CPU also got off. When i press restart button, still the CPU runs but the monitor not staring and also processor lights not getting on.

May I know whats the issue. I think its as hardware problem in CPU. I am sure monitor doesnt have problem. But eager to hear Expert's Comments. Thanks in advance

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Set the monitor to manually switch off. – ta.speot.is Oct 1 '10 at 23:48

Seems like the processor's overheating. Reapply the thermal paste and check.

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You could check the cpu fan (Speed, cleaning from dust)

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