Weird power on/off problems

[Gavinni]

Just pieced together my new computer and I encountered a really weird problem... When I turn it on the fans and everything spin up for about 5 seconds then it powers off, and about 4 seconds later it powers back on by itself and posts and everythings fine. I unplug the power cable and plug it back in and try again and it NEVER posts the 1st time, and ALWAYS posts the 2nd time, wtf? Does anyone have a clue what could be happening? Doesnt sound like a grounding problem because it NEVER works the 1st time i power it on, and ALWAYS works after it powers itself back on. ANY help would be appreciated.

Specs:
Q6600 (G0)
8800 GTS (G92)
Abit IP35-E Motherboard
2GB DDR2-800 Corsair RAM
250GB SATA HDD
20X DVD-RW
Rosewill 550W PSU
4 Case Fans/2 Cathode Ray Lights

Most of you will say its the PSU, but actually this one has REALLY good reviews on newegg and when i go into the bios the rails seem pretty solid. I dunno whats going on T_T.

 

[wildfire99]

Abit IP35-E board with bios update 14, does not POST on first try?

tl;dr; version:

"I've heard of problems with 14, what with them attempting to fix the double-boot, and just causing boot problems instead. I don't mind the double-post myself, as long as it boots OK. "

"12 will always double post after shutdown. Doesn't matter if you maintain standby power. P35 chipset should boot reliably if you allow it to double post.

P35 will not double post if you RESTART the PC. I have not seen any P35 BIOS that is 100% effective with the double post. Given enough time, I could always get the BIOS to scramble, requiring a deep CMOS clear and reflash.

Another thing to remember with many P35 boards is that a bad overclock can scramble the BIOS to the point that you may encounter hang-up during POST. The solution is to clear and reflash BIOS. It's also a good idea to make an image file of the OS cause a bad overclock can damage the OS."