weirdest problem ever

[gte615e]

So I've been building a new rig recently with a P5N-E SLI, etc. and I've been trying for weeks to get it to post to no avail - I rma'd the motherboard, tried multiple types of memory and video cards and could never get it to post. I finally give up and take it to best buy (yes i know, pathetic) and it posts the first time they plug it in! needless to say, i am completely shocked. so i take it home and plug it in and it posts the first time i plug it in. i turn it off and turn it back on and now it won't post anymore, but nothing has changed at all. do you think i could have a power issue? why would it post in one place and not in another??? i've tried a couple of different outlets and still can't get it to post. anyone have any ideas what could be causing this?

 

[cprince]

Not posting usually mean memory problem. I'm think that it's the RAM not seating correctly or having a bad contact with the motherboard. Try shaking the board to see if it'll POST. Anyway, check the CMOS battery and clear the CMOS while you're at it.

 

[GAZZA]

It initially sounds like power issues, do you have another psu to test?
Also double check your psu plugs incase something is not seating correctly.

 

[orbiter]

Could also be a problem with the cases power switch. I had a problem like this with a brand new self built system. It just wouldn't boot at all from the button. I knew it had power and all the connection where ok. I ended up shorting the power pins on the mobo and it would fire up every time. I could have ended up buying all sorts of parts if I hadn't tried this first. WARNING!!!! Its not a thing to try if you don't know exactly what your doing/risking :Q