no signal to monitor, keyboardand mouse does not power computer is turning onAnd what might have happened prior to this when everything was running fine ? ?

More details please...playing wow, everything was fine logged off wow lost everything but still had pwr to computerIf you want intelligent responses you need to provide DETAILED information about your situation, not ONE sentence posts.Normally, I get frustrated as a technician when people aren't providing enough information, despite having to tell them "DUDE, WE NEED MOAR INFOZ!!!"

...until I realize that the majority of people will do that because they just don't know what information to provide. Of course some are being just plain lazy, but still...

When my car has problems, I try to provide as much information as POSSIBLE, but I'll still get the occasional frustrated look from the mechanic's face as if I'm withholding some critical piece of info when, in reality, I don't know what he's asking for.

In any case, sometimes it's best to start with what the person has, even if there's five bazillion directions to choose from. Eventually they'll get frustrated with being run around in circles and then, SUDDENLY, the right piece of information comes out (and, the whole time, we'll think "WHY DIDN'T YOU TELL ME THIS SOONER?!!!!").

So...

imorganji...do this:

A:
1) Unplug the black power cord from the back of your computer tower.
2) Wait 60 seconds.
3) Plug back in.
4) Turn back on.

Are you getting anything on the screen now? If yes, then CHANCES are you probably had a power spike or power outage, and your computer just need to be unplugged for a bit. If no, then we move on to B:
1) Acquire a spare video card somehow (borrow from a friend, use one from an old PC, purchase one if you have the funds, etc.)
2) Switch video cards out.

Anything yet? If yes, then your video card had likely gone bad. If no, then we move onto C:
1) Remove any other expansion cards in your PC, if any. These could be sound cards, TV tuner cards, network cards, etc.

Anything? If yes, then one of those cards had likely gone bad. Put one at a time back in to determine which one is the culprit. If no, then D:
1) Unplug your hard drives and optical (CD, DVD, BD) drives from the motherboard and power supply.
2) Power on the PC. Of course you're not going to get into Windows, but at least if you get something on the screen, that'll tell you something.

Did you get anything on the screen? If yes, then bad hard drive (or bad IDE or SATA cable). If no, then E:
1) If you have multiple sticks of RAM in your PC, remove all but one.

Anything yet? If yes, then you have one or more bad sticks of RAM (or a bad slot in the motherboard). Put each stick of RAM back in, one at a time, to determine the offender. If no, then F:
1) Acquire a spare power supply somehow (borrow from a friend, use one from an old PC, purchase one if you have the dough, etc.)
2) Switch power supplies out.

Anything yet? If yes, then you have a bad power supply. If no, then we're down to the CPU and motherboard. If you can somehow get a hold of a spare CPU, great! Eliminate that from the equation. If that's not the problem, then it's the motherboard.