First post on this forum, hello all.. ive been into audio for a few years now. my current system is newer high end components, but i also have a few vintage recievers/amps and speakers. Sad to say, most my vintage recievers/amps are NOT in working order Amplifier- YAMAHA Proffesional series P-2200 Natural sound amp. Receiver- Pioneer stereo receiver SX-727 Receiver- Sansui stereo receiver 9090DB This list is the units that DO NOT work. About a year ago i took the Yamaha amp into a high end stereo shop. The owner was very surprised to see someone bring this into his shop but, was unable to do anything to repair it. I would like to know if there is sumthing i could do to repair these units, or if i would be better off selling them the way they are. Cosmeticly speaking, they are PERFECT. Any sugestions would be greatly appreciated. Thanx 4 ur time!!