I was given this D57U receiver from a friend of mine. Unfortunately,
the power is intermitten at best. When I plug in the power, I hear
what can best be described as a circuit tripping. I took this
receiver to a local repair shop which told me that I needed a new main
PC board. However when I took the unit home and opened it myself to
get a part number off the board, I plugged it in and it turned right
on.

Has anyone encountered anything like this? Also, a check of Aiwa's
website turned up nothing under this model number. I take that to
mean that this is obviously not a model that is still in production.
Does anyone have a main PC board or know of a place where I can obtain
one, if this is actually the fix to my problem?

Thanks for any input!

J.