FeedbackLoop | #112 - Korg ER-1 mkII repair @feedback-loop | Uploaded 3 years ago | Updated 12 hours ago
This unit was described as not powering up, which was accurate. It turned out that a common mode filter on the DC input was blown, and a schottky diode was shorted. An electrolytic capacitor was also found to be quite bad, so it was replaced as well.

Previous repair part 1: https://youtu.be/h0OfLD_NHDU
Previous repair part 2: https://youtu.be/Bl8OdDxI-xw