Having problems with your HP Pavilion m7580n PC Desktop ?

HP Pavilion m7580n desktop When I turn on PC after 15 seconds monitor goes into sleep or power saving mode.Message on screen window on monitor says "no signal". I have tried another monitor and it does same thing. (so it's not the monitor). I have checked 15 pin connector and it seems that both ends are connected. Had worked fine. Had some Windows Updates installed automatically recently? Can't fix. Help.


Answers :

I thing that is motherboard problem,,, check some others parts..
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