cannot see video when booting up pc with new asus motherboard

Hello, I just installed a new motherboard in a e-machines case. i am just trying to get it to boot up and it wont. all i have hooked to the mother board is the power led, power switch and hdd led. when i turn pc on the green light on the mother board goes on and the fans start spinning but no video?? not sure what to do from here. any suggestions  
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If you have any other cards connected, physically remove them and then let Windows find the video card.

Carl1975Author Commented:
i have no cards connected what so ever pci or agp. this is a built in video card on the motherboard. i installed mother board in another case and same problem no video. i tried a good agp video card and still no video. could there be a jumper setting or something on the motherboard that i havent adjusted?? motherboard is a asus a7v400-mx.
Assume that CPU, CPU cooler and memory are installed.

Any beep codes?

Check that CPU cooler fan is running.

Work with memory.  Try different stick, one stick at a time, or at least clean contacts and reseat.

Ensure that power LED and HDD LED are connected correctly and not on reset switch pins.  To be safe, just remove all and use jumper or small screwdriver to short power switch pins.

If above don't help, remove motherboard and try to run on bench (use mobo packing foam pad or cardboard to support mobo).  That will ensure no case shorts.

Remove and reinstall CPU.

That's about it.  Post back with results.

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Could just be dirt...

I don't know if this will void your warranty, but I don't think so. Remove your video card and clean the gold pins with a brush (I use a small paintbrush - clean of course). If you want, you can clean the socket also. Works everytime for me. =)

Check also if the monitor cable pins are still straight. I've lost a couple, but mine still works.
I do not have the information on the motherboard. You should be able to disconnect the video function. It would be logical design parameter. You need to take it out of the circuit before the new Video board will work.

first, post the model of your mobo.
things to try further :
- disable onboard video, and try with another video card, even an old pci one will do.
-if you have more than one memory stick, try one at the tiume and swap them.
you are aware that before you get video on the screen you have to have : mobo+cpu, 1 ram stick, video card
in some cases a disk is required too.
If you still have no video : the power supply can be bad, or you have a bad mobo, so have it replaced.
Carl1975Author Commented:
problem was the frequency speed on the motherboard. chnaged it fron 200 to 166 and this fixed the problem
PAQed with points refunded (125)

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