If you stored it in an area with high moisture content it is probably corroded at most of the contact switches. Capacitors also hate moisture, especially paper capacitors! The tuner is also probably oxidized inside. Now is the time to be brave and pull it apart, but first PULL OUT THE PLUG from the wall. Have at it with electric parts cleaner spray and clean, dry compressed air. If you believe that just because you stored it in your house, there was no moisture, think again! Radios like cars do not do well in storage unless you take precautions to protect them!
SOURCE: Hi i have a Rotel
Try fixing your remote controller, because sometimes when we neglected to replace our remote batteries for a while, it will leak and it will build up on the contacts of the remote pad.
Take off the battery, open the back of your remote, lift the circuit board, clean the green painted part with cotton balls slightly damp with rubbing alcohol as well as the black thingy behind your remote pad, let it dry put it back together, replace with a new battery and try if it works.
Good luck
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