So, when I rescued this Sony cassette deck from the morgue, er, I mean Goodwill, the eject lever wouldn't budge and hence the cassette door would not open. I let is set for about a year (this was all many several moons ago), and then I did something, I don't know what, to get the door to open and the eject lever to work. I then played tapes, for at least 3 years, on and off. Recently, I moved my room around, and the Sony got set aside for about 2 months. The other day I put it back into the system, and....stuck door again! I've downloaded the service manual, and studied the exploded view, but I can't divine any info that would help me get this thing working again. Help!