i have recieved a korg poly 800 from a friend. it has been in storage for atleast the latest 15 years, the only thing i know of it is that my friend couldnt get any sound out of it when she tried to play on it some days ago. her guess is that the internal batteries for the patches has ran out of juice half a decade ago...

what i do need to know is, if it is hard to change these batteries? or could there bee some other problem with it? all i know is that it was functional when it was stored, many years ago. i have no manual or anything like that.

thanks
orphan