No video output on my PC - Help!

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0llie

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Mar 15, 2014
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10,510
So I just bought a second hand desktop Pc with 2 monitors, went to see it before hand and it was working fine, took it home and now I can't get any signal output to the monitors, tried different cables and different ports and other screens but nothing. I also made sure the graphics card was properly inserted and there weren't any connections that had come undone from transport. When I turn it on everything lights up, all the fans run, DVD drives open etc... but no video output?

The specs of the pc are...
-Asus M4A87TD/USB3 870 Socket AM3 8 Channel Audio ATX Motherboard
-Corsair 4GB (4x2GB) DDR3 2000Mhz (8 GIG RAM total)
-XFX HD 6870 900MHz 1GB GDDR5 Dual DVI Dual Mini DisplayPort HDMI PCI-E Graphics Card
-AMD Phenom II X6 Black Edition 1090T 3.2GHz CPU
-ZALMAN CNPS10X Heat Sink
-NZXT Lexa S Case USB3.0 Version
-128GB SSD + 1TB HDD

+ 2x Benq G2420HD Full HD TFT LCD 24" HDMI Monitor

Hope someone can help me out here with some advice? Thanks, Ollie.


 
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bjaminnyc

bjaminnyc

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Jun 17, 2011
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Unfortunately that board doesn't have onboard video so you'll probably need to get your hands on another video card if basic trouble shooting doesn't fix the problem.

Pull the video card and reinsert, remove the bios battery as well as the power cable or use jumpers to reset the bios. If you still don't have any video output, find another PCI-e video card to test to eliminate the MB as the culprit, and/or test the 6870 in another PC to eliminate vid card issues. Also during these tests only have 1 monitor connected just to remove an element of complexity.

 
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bjaminnyc

bjaminnyc

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Sounding like it. Check that all of the power cables to the MB are seated correctly as well. I've had an instance where the 6 pin somehow came loose but for some reason it was way down on my list of things to check.
 
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0llie

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Mar 15, 2014
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Ok, I have detached and reattached all the cables to the MB and I don't have any other computers or video cards to see what's wrong with, so how do you recommend I go about finding what the problem is for sure?
 
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bjaminnyc

bjaminnyc

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Sorry to say, but you're going to have a hard time isolating the issue without a way to test the components independently with known working parts. It sounds like you've tried the obvious. Probably either are going to need to spend some cash or find another PC to use as a test bed. Or go back to the seller.
 
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0llie

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Mar 15, 2014
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The seller is giving me some money back as 'compensation'

If the problem was caused by the computer taking a knock on the car ride home, what component would be most likely to break.

Also if I were to buy a replacement motherboard, would you suggest I buy the exact same motherboard or a different one? And the same thing for the GPU, would you recommend that card as a replacement or a different one? I would like one which can handle 2 hd monitors and handle most games.

Thanks
 
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0llie

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Mar 15, 2014
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Ok, so I've tried unplugging every component one by one and pluging it back in and turning it on and I never got a start up beep or anything, I don't even get and beeps when I removed all the ram modules, does this mean it's my motherboard for sure or is there any chance it's the processor?
 
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bjaminnyc

bjaminnyc

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Without being able to independently test the components then its going to be hard to say exactly. However if the issue is from a bumpy ride its likely the MB. I doubt its the CPU, does the it have a large cooler?

You don't have to get the same MB, you could actually buy a very inexpensive AM3 MB without any noticeable difference with the exception of high end overclocking.
 
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