Hello everyone, I have a problem regarding my hardware not detecting my CPU. I am using an intel pentium 4 computer using windows xp home edition.

The problem is, since 2 days ago, After I would boot up my PC, my mouse (which would normally turn red) keyboard (which would normally turn green) and monitor do not detect that it has just powered on.

I have tried replacing the monitor, mouse and keyboard, all to no avail.
After starting up the PC, the monitor still displays the message: "Self Test, Check your PC and Signal Cable Monitor is Working" which I deter is the message when the monitor believes the PC is not turned on? This is the probem, because the PC IS on. The computer will not even go to the stage where it displays the Windows XP screen in black, or the systems information (at bootup).

I don't understand why the three would not detect powerup, because all of the plugs and wires are still connected just as they were 3 days ago (when it was still working).

The PC itself will also not shut down when pressing the standard shut down button, instead, I have to go around to the back and press the power switch which I think may be harmful, having have pressed it numerous times in the attempt to fix it.

I dont want to have to rely on a computer tech because rates around here are all very expensive and was wondering if this problem could be fixed more easily. I'd be much obliged for any help or tips.

Thank you.