Mine did that. What you need to do is to fill the laundry with warm water, put in some dishwashing liquid, and wash the motherboard. Yes, I am serious. Let it sit in the water completely submersed over night, and then let it dry for about 2 weeks. Do not blast it with a hairdryer or anything, let it air-dry. This fixed my Classic II (which had the exact same problem) for about a year before the analog board went out on it.