Ok, Today I installed a new CPU fan and case fan to replace failing ones. After the installation I turned on the computer it displayed bios and then all the fans quit and the screen went black and it started making an alarm type sound. I checked everything and it was all installed properly. I turned it on and it made the sound again but bios would not show up. I thought maybe I had to much thermal grease on so I removed some with a plastic bag (read to use something like that to keep from leaving lent). Now the fans work but the monitor still does not display. I hooked it up to a different monitor it displayed bios then made the noise again and that monitor will not show anything now. If I unhook the monitors they say check the connection so I pretty sure they are not blown. Any Idea what is wrong?