Phonoland

The first thing to happen, should be a "motor on" signal. Depending on the "version" of the interface board, it could start the motor in either direction. Mech should proceed to the "home" position, and MCU should get the "reset signal", and boot up. Do you have the schematics ?
Ron Rich

Yes I have the schematics, and I understand electronics very well. So thats not a problem
Found one problem, the processor socket was very dirty causing the oscillator not to start running. Cleaned the socket and thats working now.

When I measure on any of the processor pins, databus etc nothing is happening, I see some highs, some lows, but no pulses. And thats not what I would expect.
Adressbus should show me some activity.

J1 pin 5 and 6 "Total Enable" looks like something I should trigger to enable the MCU ? Is that true?

I don't recall-this is getting a little to "techy" for the forum, so I'll PM you.
Ron Rich

I got the processor running.
Main problem was a really dirty socket for the CPU and the reset circuit was constantly active causing the CPU not to run.

Now fixing up the rest of the jukebox to see if there are any other problems with the MCU.

Started fixing up te upper "lid"

The plastics that diffuse the light were really brittle and yellow, so I made some new ones for it

Oh, NO !!! You forgot to re-install two washers, and the nut--horrors !!
(All kidding aside--looks good ) Ron Rich