I installed a new cpu fan into a computer that has been giving me trouble for the past few months, every time I think that I have solved the problem, something new happens. So I installed a new fan and now my monitor cant get a signal, while installing the fan I removed the ram from the board and put it back after. The computer doesn't crash at all, or make any kind of beeping sound, so I doubt I installed the components incorrectly. Before I put in the new fan, the display would work fine, but when I tried to install XP, my computer would crash.