so frustrating to have the same problem again with it just sitting in my shop.
I have a shop full of test equipment that sometimes I just cannot get to the bottom of the problem so it gets moved to the side for an easier repair on another unit. But then get back to it later when you have more mental space to look deeper into an issue. I like the 465M as there isn't to much of an issue of a transistor coming loose in a socket since all parts are soldered into the board. ?I have spent days trying to pin down issues on vintage equipment like many members of this group but here is where you hopefully get some help. ?Do some PS checks and advise your findings along with cycling all push buttons to help clear any oxidation.
Craig
Craig Cramb