Korg DW8000, Mono/Poly, MS-20...

Hi !

I just bought an old Poly 61 that need a bit of repair.

First of all it doesn't have any Joystick, I'm not sure but is the Joystick the same as Poly800 or DW8000 one ?

Else, when I turn on the synth the screen shows "11 11" and there's always the same sound.
I tried to load original patches via tape jack, and it always shows "Good", but it doesn't save any patches. I still have this display message.

The MB had a battery leaking problem, I cleaned that area, and repair "ways" beetween resistors and some ICs in that area.

Any idea ?

Sorry for my english this is not my "mother language" ;)

Regards!