Pc will not boot

[what4now]

Hi guys,

I'd appreciate a little advice here.

Turned on computer this evening and it would not boot at all.

All the fans spin, light for the mouse comes on but i get no picture to the monitor at all.

I have disconnected the optical and hard drives and left in only a single stick of RAM with no joy. I get no beeps from the motherboard. Also tried with a different graphics card.

Once the computer is turned on the power switch fails to turn it off again.

I'm thinking a dead motherboard but would welcome any suggestions.

System is a P4 prescott in a asus p4p800se.

 

[what4now]

Hi,

Checked memory stick in an old system and that seems fine.

Next up I tried the power supply. I hooked up an old power supply and the system booted up fine.

The power supply was the one supplied with my antec sonata case.

Now all I need is a suggestion for a new power supply.

System is a p4, gig ram, 6800gt and a couple hard drives.

Thanks for the help.