OldSynths

Hi, I've gotten hold of a Juno 60 to have a look at but it doesn't
work. It looks in almost perfect condition and all the lights go on
but the only noise it makes is a bit of crackle when the volume or HPF
are moved and the chorus seems to work (effecting the hiss when the
volume is up). Also I just noticed that the lights/power cut for a few
seconds and i had to fiddle around for them to come back on. Any
suggestions on the problem? Battery? CPU? Is it something i can fix
myself? Thanks.

P.S. I realise there is a Juno specific forum but I'm still waiting to
be approved.