Computer starts/black screen/doesnt post

Foxconn C51xem2aa-8ekrs2h motherboard
November 2, 2009 at 06:32:13
Specs: Windows Vista
I just finished installing a new NVIDIA 9800GTX+ 512 MB EVGA video card and two sticks of 2GB memory Corsair (CM2X2048-6400C5 G). Then what occured is inexplicable. My computer starts, however it does not POST, does not show anything on the screen, and it has an onboard motherboard LED code of 5D. I do not really know how to counter it. I have tried removing the memory and the card with my old ones but it still doesnt work. Thank you so much,
Thanos Leontaris

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#1
November 2, 2009 at 07:22:32
This could be any number of things. Did you upgrade your Power Supply when you upgraded the Graphics Card? If not you may have overloaded it. What Wattage is your power supply?

There are three reasons a computer will not POST; No Power, or power cords came lose; CPU overheating or CPU fan failing (Worst case bad CPU); or the Memory is incompatible, not seated right or was shocked by static electricity.

Check these three things out or better yet take it to a repair center.


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#2
November 2, 2009 at 07:58:09
The Wattage is 700W, so I am confident that it probably isn't the
case. i changed only memory and Graphics card.Fans are
working fine, and the static electricity although possible would
have caused a spark and I didnt see any...In regards to the
memory,i used my old memory instead and it still did the same
thing. If the motherboard was zapped by electricity, the computer
wouldnt even start...am i right ?
Thank you.

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#3
November 2, 2009 at 08:18:04
"static electricity although possible would have caused a spark and I didnt see any"

ESD won't necessarily generate a spark visible enough to see. So you could easily "zap" something without even knowing it...

If the motherboard was zapped by electricity, the computer wouldnt even start...am i right ?

Wrong. ESD could affect components on the MoBo (or other peripherals) that have little or nothing to do with the starting-up of the PC.


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#4
November 2, 2009 at 11:04:29
I am not sying this is the problem with your computer just trying to give you an idea of where it could be. Its up to you to do the trouble shooting.

You have to setup a bench computer (Mobo, Graphics Card and RAM that you know works) Then you can take each of the components off your old system and start applying them to the bench system until you determine which one is the problem. It could very well be the mother board is fried but you will not know that until you put the components into one that works.

This is why I suggest that you take it to a technician to get it checked out because he will have such a system. Me personally, I have a bench system that I can play with when doing these things but it sounds like you do not.


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