as the title says HELP. whenever a try to turn on my 2007 mac mini, it powers on and see the light go on and. i also hear something spin, but nothing happens after that. both monitors i have tried say no signal and i never hear that chime sound that macs make when they startup. this computer had corrupted ram a couple of years ago if that helps. can someone please tell me if they had similar problems, and what they did. i would hate to take it to get fixed again… please help.