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I have a Compaq Presario F700 SN # CNF7350HNH I got it for Christmas and I have a problem with the screen staying blank when I turn it on. After a while of turning it off and back on a few times it comes on. Can you help me? Any idea why this happens?

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Have you tried it on a different monitor? But it sounds more like the computer is hanging in POST which points to hardware issues either CPU motherboard or RAM. And check to make sure the light on the back of your power supply (where you plug the power) isn't blinking.

Posted on Aug 02, 2008

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Check the capactiors for swelling. Ssytems of about your pcs age all have this problem. ALso check the fax is spinning and unobstructed as well.....here is a pic of what swollen caps look like

ff49fb2.jpg

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At this point I assume you've tried to go into SAFE mode, and into BIOS with no luck. You're right about the overheating but I think the damage is done. If the unit will no longer stay on in any mode or condition then heat has ruined something. First easiest part to check is memory. The check the CPU (most laptops still have a plug in CPU). If neither of these are suspect then take everything off the motherboard, including the screen (I use and external monitor). If the problem still exists then it's time to use a scope.

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