PSU Starts Up as Soon as it's Powered Up

G

Geater

New Member
Hi everybody

I recently bought a new motheboard (Asus A8V-VM if it matters). After installing it all correctly, whenever I turn the PSU on it (the PSU) immediately starts up, rather than waiting for me to turn the computer on (the chassis and CPU fans also start). Strangely, as the fan builds up speed, the HDD/Power and mouse light all flicker on and off in time with the rotation, as the PSU fan gets faster, so do the lights. Once, and once only, it got up so much speed that the lights stopped flickering, after which I was able to turn the computer on and it worked fine. Since then though, it stutters along at a fairly slowly speed, not enough to power on the PC.

I've since run the motherboard stripped down, and out of the case, to confirm that there are no short circuits. Does this sound like a fault with the motherboard, or has anyone come across this before? It's not the PSU as I've tried 3 different ones (from 370-500w).
 
Sounds really like the motherboard. I'd RMA is immidiately before any more damage occurs/before RMA date passes.
 
Thanks man - yeah, I've done that already, just wanted to understand what was going on really.

Incidentally, I did try it with an older PSU I have, that doesn't have the extra 4 pins on the main power connector. This behaved in the same way, but always got up to speed allowing me to turn the computer on. However, this PSU didn't have enough current on the 12v rail and so would always cut out just before any graphics were going to be displayed. This does lead me to believe that the CPU and memory are fine though.
 
An weaker PSU won't power an high end system well. I'd suggest RMA'ing everything (if bought from Newegg). Just to be safe.
 
It was from eBuyer (I'm in the good ol' U of K).

Cheers for the advice. It really bugs me that I was using it fine for that one evening, but then the next day the thing won't even get up to speed to allow me to turn it on. Mind you, I've never heard of a PSU trying to get up to speed before you can turn the computer on before!
 
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