akrasia

The reason I am asking is because I thik my cpu may have been damaged when I was cleaning my case out, I removed the heatsink and to clean it. And now when I try to start my computer, I can hear the HD spinning and fans on, but I get nothing on my screen. After about 10-20 seconds my computer makes a series of beeps. Is there something else I can try before I replace the CPU? I have already tried reseting the CMOS, didnt work