What is your opinion of a Kenwood KR-A20?
Is it worth it to repair? My friend sent power into the phono trying to hook her CD player to it. I guess the power has blown something. There was a 4 amp fuse blown but when I put a new one in it just blew.
Anyone know what repair it would need and would it be costly.
Not worth repairing. There are plenty of used receivers on the market, especially ones that have digital input and surround sound. If you can fix it yourself, fine, but if not, a repair is not worthwhile.