PSU Help

I have an AX4SPE-UN motherboard found here and a
Sansun True 450W 20+4pin ATX PSU - 2x SATA & PCI-E
here
Now when I hook it up theres a red power light turned on inside the motherboard to indicate power but when I hit the power switch I get a tiny flicker of life for a second, some light and the fans move slightly but not enough to reach boot mode. I tried again with using just the minimum componants but got the same results.

Would I be right in assuming the power supply isn't compatible with the motherboard? or have I just over looked something.

 

Hello Akastar,

Could you please post your full specs for us please? Sansun PSU's are budget PSU's so that might be your problem.

Thanks,

Mike

 

The issue I have should only the motherboard and the powersupply as everything else is not really connected.
I had a ATX-300GTF powersupply in before but thats gone now so I brought the other one. How will I know if the issue is with the powersupply or the mother board and which powersupply should I consider buying instead?

 

Make sure the main power switch on the PSU is on.

 

would that be the one that made the small LCD on the motherboard turn red?
:O

 

okay doing a little research into the possible issues I came across this

"For the new Intel P4 processors, the 5V must provide at least 20 amperes. Both AMD and Intel P4 also require the +5V standby can provide at least 720mA or more. Without suffcient 5V and 12V current from the power supply, the system may become unstable/unreliable and may experience difficulty to power up the system."

How do I check that the PSU is providing sufficent current?

 

have u plugged in the 4pin 12v power cable

 

It's an ATX 2.03 standard PSU. ATX 2.01 was when the P4 hit, so any PSU (basically anything out right now) is at least ATX 2.03.

Make sure all power connectors on the motherboard are plugged in. You have a main 20 or 24-pin main ATX power connector. There's also a 4-pin 12V auxillary connector in the CPU socket area--consult the motherboard manual. If those aren't plugged in, you'll find many motherboards will be unstable or have trouble booting.

You mean LED? Many PSU's have an on/off switch on them in the back, where the cord going to the wall plugs in. That's what I'm talking about. A few motherboards have power and reset switches on them, but most just have pins where the power, reset and power LED's hook up to.

 

The specs of the PSU (amperages) can be found on a sticker on the side of said PSU.

 

Also make sure the board is not shorting out, check to see that there are no screws or anything conductive between the motherboard and the back mount plate.