> Hi,
> Thanks for the reply.
> I already checked this. I also dubbel checked it in another rack,
> which has another 5V adaptor.Any other ideas
> grtz

Probably the +5V and +12V have been shortened when the other module hes been installed. This would fry the +5V circuits of the A-190. Please contact out A-190-1 specialist Matthias Marass (keyboards.at.doepfer.dot.de). He is responsible for the A-190-1 service.

Best wishes
Dieter Doepfer