The Kawai & Teisco Analog Synths Group

Hi all,

My Roland MKS-70 suddently started to behave strange.
These are the synpthoms:

1. Most of the times (but not always), in addition to
the correct preset name and all other information, the
entire display lights up. You can see it all lights up
but while the actaul data lights a bit more strongly.

2. Many times it will display ok, but after a few
minutes of working with it, it will restart itself or
will just stop displaying anything (blank display) or
will just display only a portions of a few
charaters...

3. Once the problem initially occured, I tried to fix
it and than found that in addition to the problems
mentioned, the main CPU of one of the synth boards was
defected (played corrupt sounds). I replaced it and it
solve this specific problem but all other ramined...

5v and 15v rails seems to be ok (I measured 4.85v and
14.8v).

Does anyone have any idea what could that be and were
to look at ?

Thanks in advance !