new computer problem

[imported_Timmy]

I'm building a new pc and when I turn the power supply switch on it seems there is no power going to the MB, no led's no post codes no nothing. But the strange thing is when I turn on the switch on the case it starts to run for about 1 second than shuts off. I checked the power supply with another pc and it is fine. I was told it could be the MB but I want to make sure I know for sure before I send it back. Does anyone here no what the problem is?

 

[GamesMasta]

Make sure your RAM is seated properly. Try a different stick, or if you have 2 try 1 in one slot and then try in another slot with only that 1. Then repeat with 2nd stick of RAM. Try to unplug harddrive, cd-rom, audio, usb, light wires. Only have ram plugged in and video card try powering it on like that. (also make sure no other things are plugged in like keyboard, just the monitor)

Make sure video card is seated properly if you have a card...
Perhaps reseat CPU...

 

[imported_Timmy]

Originally posted by: GamesMasta
Make sure your RAM is seated properly. Try a different stick, or if you have 2 try 1 in one slot and then try in another slot with only that 1. Then repeat with 2nd stick of RAM. Try to unplug harddrive, cd-rom, audio, usb, light wires. Only have ram plugged in and video card try powering it on like that. (also make sure no other things are plugged in like keyboard, just the monitor)

Make sure video card is seated properly if you have a card...
Perhaps reseat CPU...

Thanks for the reply.

But won't the MB led's and post code turn on even w/out the video card and ram installed??

 

[GamesMasta]

When you have your power supply plugged in just to the motherboard, I'm pretty sure the LEDs should light up to show you that the mobo is getting power, but of course the mobo won't actually run until you push the power button.