I used a universal power adapter (not included) and it powered on and all of the buttons, switches and screen seem functional. The only obvious issue was that the 'cabinet' button appear a little loose, but still works.
KORG TONEWORKS G3 GUITAR PERFORMANCE PROCESSOR POWER SUPPLY ADAPTER 9V
Korg Toneworks DTR-2 19" Rack-Mountable Guitar and Bass Tuner
Korg Toneworks Pandora PX2 Guitar Multi Effects
Korg GA-30 Guitar Bass Solo Tuner Digital Chromatic Tuner
Korg GA-2 Guitar Bass Tuner Pocket Size Digital Display
Korg CA-2 Guitar/Instrument Chromatic Tuner
