I turn on my computer, all of the LED's are on, the CD Rom turns on, the fans turn on, but my monitor and keyboard do not. Originally, I could turn the computer on and off a couple of times and It would then turn on my monitor and keyboard, and then boot. Then it started turning everything on except the keyboard. However, the monitor would be a black screen with a flashing cursor in the top left corner. Again I would turn on and off the computer several times and it would boot. Now neither the monitor or the keyboard work, no matter how many times I turn it on and off..

meet_usha, SWAG, power supply? Failure is pretty common. They supply various voltages for the different peripherals and at different wattages. I suspect one of the voltages is amiss. Short of analysis by a pro, dunno of a way to test. HTH. Ed in Texas.