I have a Regelwerk that does not boot fully. 

- PSU = 9v DC, correct polarity (- out, + in, same iconography) 1a (500ma required) 

- Nothing plugged in but the PSU, so no chance of loops or external influence. 

- Boots as far as displaying the OS Screen: 

"Regelwerk   V.171

Doepfer (c) 300799"

- Boot process ends there, and the (blue) LEDs flash in unison at apparent random intervals.  No discernible pattern. 

- Using the Factory Reset process from the manual found in the link below changes nothing. 

FAQ in english

			FAQ in english FAQ's LCD readouts during the reception of MIDI SysEx data:
			View on www.doepfer.de	Preview by Yahoo

I have photos, serial number,  and videos if useful. 

Thoughts, suggestions