Dell desktop turns off automatically

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Hello,
when i start my computer then he is automatically of in 15-20 sec not more and no display show how i solw this problum?



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3569
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Friday February 6, 2015
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July 18, 2016
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Did your cpu fan running when you switch on your desktop and you hear any beeps?
cpu fan is not running and no beep present in then but when i unplucked DVD rom then cpu fan is running.
Posts
3569
Registration date
Friday February 6, 2015
Status
Moderator
Last seen
July 18, 2016
879
What about PSU fan? Did you notice that PSU fan running good constantly or it stops after few seconds?