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Main board won't power up

\015 I have an a7s333 main board that will not power up. The atx power supply and power switch are fine. When the atx power is first turned on, when the power switch is pressed the board poweres for a moment, there is an audiable click and it loses power. Nothing will hapen after this unless the atx powere is turned off and on again. I had a quick look and don't see any burnt or swollen capacitors but i have not checked them.\015\012\015\012i have a ms6390 msi mo bo nothing comming up on screen at all no beep either like there used to be when the screen use to start thanks for any help brian\015

Answers :

You may need to reset your processor and heatsink. Sometimes the thermal gel between the processor and the hearsink will evaporate over time and cause this problem. Try appling more thermal grease, reseat the processor.heatsink and try again, (When you do this, also clear your BIOS setting by using the Clear BIOS jumper and remove the CMOS battery for 3 to 5 minutes. Replace all prior to restart.) Good Luck.
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