when i turn on my computer it keeps restarting, it will stay on for less than a second and it would do that about 200 times. when it restarts it makes a noise like the hard disk is starting up but it is coming from the power pack. when i press the power button that is when it will start restarting. after it has done it about 200 times it will just stop and stay on. i press the restart button and the computer will turn on fine.