What is the problem with it? I worked at ESPN while doing piece work at Chicago Factory Service shop bought from Teac but I think they closed around 2001. In my time at Teac 1982-1987 we never saw such a unit in the shop and we very few times saw MS16. Remember the time frame as today 30 years later there were unit made after the 90's and when they were new they probably did not have problems then. In the past I would get a fresh original manual and send it Fed Ex to Rick at Stereomanuals.com but Rick died last year so the place is still running but not with the same capabilities. I don't know what will become of it?
Power supply problems most always point to power supply filter caps- put all new ones in and you will most likely have fixed the problem. I had a couple of Radio System Consoles at a station and I told the owner they are due for a recap. He refused- then some time after he called me in a panic saying the boards are blinking- this means intermittent shorts. He order two complete cap kits for the power supply and I put them in. The boards ran well until he sold the place.