Problem started when a friend turned computer on and mouse curser was missing, she said that there were no lights on mouse or keyboard. So she then tried replacing mouse. Now the computer will not boot. It gets to the black screen where it say's Main Processor .. memory Testing... and then it say's, "Detecting IDE Drives ..." it does not say anything else. On the bottom of the screen it states," Press DEL to enter setup" but nothing happens if you press delete. Also the light is not on the mouse or keyboard. I've tried two different mouse's and keyboards. I tried clearing cmos both by jumping the pins and also by removing battery, still no luck. I also tried putting windows cd in but it would not boot to cd. Same screen would come up. It is a MSI KM4AM-V ... Sempron 2400. It has onboard sound and video. Any help would be appreciated.