My computer stopped booting yesterday and I tried various tests on it to see if the mother board went bad. The computer will turn on, fans spin and the lights will turn on but it doesn't boot, or does the single beep at startup as it usually does. I tried some tests to find the cause. I took all the ram out then booted but it didn't beep nor did it for the rest of parts except.... The Hard drive. I disconnected it, booted and it beeped and and started booting till it said "no hard drive detected". I then reconnected the hard drive and it went back to the same no booting state. With the hard drive unplugged though, I am able to access the BIOS. Any ideas that can fix this?