- Ensure the sustain pedal is not pressed during the power-up sequence.
- Power cycle the keyboard (turn Off and On). The polarity is automatically sensed on power-up.
Source: SHORTboard 49 — e-mu-longboard61-shortboard49-user-manual (manual)
Symptoms this guide addresses
Source: SHORTboard 49 — e-mu-longboard61-shortboard49-user-manual (manual)