Discussion about the Korg PolySix synthesizer

Hello,

I need help with my Polysix. Here's the "symptoms":

1) All LEDs are staying on after power-up (tape is disabled); OR
2) Everything is fine, but after 2-3 minutes it automatically returns to Patch 1, Bank 1.  

Any idea ?

BTW, mine was recently restored with the KLM board clone. It worked well for a couple months before these problems appeared. 

Many thanks !
-Nicolas