Rhodes Chroma Polaris

hi
after about 1 hours play, my chroma polaris II has totally frozen up . 
all of its lights are on apart from the "assignable control" section, where only its volume 
button light is on . 
if i press 7, 8 or 9 on the ank select panel, then the bend lever range light flashes .
i had not moved my synth, and have been using a midi controller i had bult in max/msp to 
control it . 
now it refuses to make any sound, nor respnd to midi nor buttons . 
i have opened it up and trimmed the membrane tails, with no success . 
in your experience, is this a membrane issue or something more serious ?

a couple more points  :
-im sick of constantly repairing and trimming the membrane . is there any more 
permanent fix that can be done. 
-does anyone know of a synth repair shop/guy in japan ?

thanks in advance for the time

peace

a