Hi everybody!

Please help me - when I turn power on, nothing appears, no noise (fans), no screen.
My motherboard - MSI 648 Max
P4 2.4, Zalman heatsink
Enermax 561 Wt
Videocard Matrox 550
Memory 512 Mb Crusial 2100.
Case Lian Li.

Since what should I start to seek the reason?
May the processor or PSU be guilty?
Thank everybody.

What changed in the environment to cause this? New hardware? Power surge? Act of God? Gremlins?

Seriously, if the PSU isn't even getting power to it, then that's the first place I'd look...of course, I'm not as saavy as some of the other folks here, but it seems logical.

Hope that helps,

SimonXP

if it's a new system (you haven't said), i would suggest that the power button on the case isn't connected to the appropriate motherboard jumper.open it up and have a look with the help of your motherboard manual to point you in the right direction.don't worry, it isn't too complicated, just a bit fiddly.

I have an old Msi P3 board with dual processors. I used to have the same problem that my PSU wouldn't start att all, to fix this i usually had to pull out the power plug to my PSU an wait for a couple of minutes... then the computer would start again. So after a while i got tired of this and the next time the PSU wouldn't start i pulled out the ATX connector from the mobo and bridged the green wire to a black and Presto! the PSU started... pulled out the bridge and plugged the connector back. But now when i pressed the power switch the PSU Started but the mobo wouldn't POST, now matter how long i waited with the power cable pulled out.
It turned out after a long while of testing that one of my processors had broken... so with one processor the computer worked with no problems at all!!!
The funniest thing is that i hadn't done anything to my computer, no upgrade, no powersurges nothing... the processor just died like that..... go figure...

That's not a knife... THIS is a knife!