A7M266 will not power up

[Squidfrites]

Hi I\'ve just built a new PC with the Asus A7M266 (with Athlon AXIA 1GB, 512MB PC2100 DDR RAM, Tekram DC390U2W SCSI, Enermax 431W PSU .... I won\'t go on!) IT WON\'T POWER UP AT ALL! http://images.thetechguide.com/forum/public/style_emoticons/<#EMO_DIR#>/sad.gif\' class=\'bbc_emoticon\' alt=\'\' />
There is a green LED on the board that is on to indicate power but when I press the ATX power switch nothing happens.  I have triple checked the various connections to the motherboard and tried a different PSU.
I\'d be very very grateful for any suggestions.

Thanks!

[Josetann]

Take the motherboard out of the case, and hook up just the bare essentials.  Even use the onboard video if it has it.  Plug in a keyboard, and a monitor, and see if it powers up.  If it does, then there\'s probably a short between your motherboard and the case.  If it doesn\'t, keep it out anyways.  It\'s probably not going to be the RAM (should post even without RAM in the board), try to rule out whatever else you can (more than likely it\'d be a mobo problem, but could be a cpu or something else).

[[email protected]]

I had a similar problem once with an Asus board.  I was about ready to send it back and just by chance I hooked the board to a larger power supply.  Even though the original power supply was brand new and tested good, the board needed just another 15w (250w vs 235w) to kick on.  Thanks, vw

[rdc]

I had a similar problem and it was due to my drive a not correctly connected .