No power to mouse, keyboard no signal to moni

Hello,


My son checked my computer by moving the hard drive. It had been working just fine. He turned it back on. When I went to use it I had no power to the mouse or keyboard, there is a light on the monitor, but it is getting no signal.

I tried taking out the power lead and holding the power swith in for 30 seconds. Now when I turn it on, it will not turn on immediately,but will erratically.


What should we do now?

Thanks