> Even stranger, I turn the synth on a few hours later > and it works again. Strange. Thermal problem? Sounds like a cold solder spot or (in case there's anything sitting in sockets) contact corrosion to me. Rainer -- Rainer Buchty, LRR, Technical University of Munich Phone: +49 89 289-28401, Fax +49 89 289-28232, Room S3240