N64 Powering on, no video/audio and humming noise

Hi, I just bought a Nintendo 64 the other day. I hooked it up to a HDTV. It worked flawlessly, and in the middle of game play, it shut off, and started making humming noises. I tried messing around with it, cleaning my games, and didn't work. I switched AV cables, nothing. I jiggled the power battery around, and it fixed it for about an hour. I re-seated my jumper pack, and did nothing. I keep messing around and poking at it a lot, and it is now getting no signal for a while. There is a suspicious humming noise coming from the A/C adapter box that plugs into the Nintendo 64, and I get a red power LED. Nothing else, just a no signal screen. I tried everything, dusting out the ports, and it did no good. Would anyone know what I should do?