COMPUTER WON'T START

Try this first: disconnect the power cord and wait for about 15 minutes, then reconnect and try to power up. If you get the same result, you may need to buy a new motherboard. Good luck.

Is this an at or atx system? Does the power supply fan run?

Disconnect all power connections and turn on the power supply. If you have an ATX system, you will need to leave the power connected to the motherboard. Also, if you have an ATX system, it wouldn't hurt to remove the cables leading to the dives and maybe even all cards but the video card. Make sure to leave the ram and processor though.

If this works (boots with atx or causes power supply fan to run when it did not before) try adding everything back in one at a time, truning on the system in between times to see if the new addition has caused a problem

Even new power supplies can be bad. Take it back to the store and ask them to check it. For $12 you can buy a power supply checker, all you have to do is remove the connector form the mother board and put the device on and plug the supply in. It haslights that will tell you if its good.

Also check to see that there is no metal touching the motherboard. Is it mounted properly using non-conductive metal or plastic mounts? Anything touching or under the m/b can cause a short.

Did U reset CMOS?
The CMOS it is reset through a jumpre on your mother board, you have to find out wich one is it,
there are only two ways you can place it because there are only 3 pins, so place it the other pin for 3 or 4 secs, that will reset your CMOS!
Try that and let me know,
I hope it helps you!

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