iPod turns on, goes to Apple logo, then cuts off
I turn my iPod on and I hear some odd clicking noises and then screen comes on and shows the Apple logo. I wait a couple seconds, then it cuts off and the hard drive spins down. I've done this many times with the same results. I tried diagnostic mode, but before it even finishes the first test, it cuts off. I suspect it's either the logic board or hard drive, but I'm not sure which. Can someone help?