Hi Dieter

thank you for the advice.  I followed your instructions on both of my A-100LC6 units.  The +5v leds are consistently as bright as the +12v/-12v leds on both rails of both units.  Both adapters indicate that they are working.

The A-190.1 lights up and will not reset.  The A-113 gives no indication.  Is it a case that I now have to return both units to Doepfer for repair   All my other modules are working correctly. It is just these two modules.  I only use Doepfer modules and have no other modules from other manufacturers in my system so their can be no conflict there.  Do you have any other suggestions I could try

Thanks

Dave