I am trying to fix a friends Dell studio computer. When i got the computer i tried turning it on but, all i got was a blank screen. It seems like it will not boot. I had the keyboard and mouse plugged in but when i started it i got 2 beeps. I unplugged them and nothing. I have removed the memory and everything seems to be ok with them. I have also removed the cmos battery and jumper but still cannot get the computer to boot. Can anyone please help.