Service Manual - Korg Pa700

Official literature specifies strict maintenance protocols to prevent hardware failure:

If the unit is stuck on the startup screen, a "soft reset" can be triggered by holding the [EXIT] button while powering on. Common Maintenance & Repair Issues Korg Pa700 Service Manual

Ironically, the service manual is clinical. It tells you how to disconnect the joystick, but it does not tell you that the joystick's potentiometer is a non-standard 10k ohm linear taper that must be bought from Korg Japan. Korg Pa700 Service Manual