: Some advanced users perform a "Power Supply Mod" to install an internal PSU similar to the Korg M3. korg m50-61 service manual - Elektrotanya
This section is often integrated into the main board korg m50 service manual
Technicians often reference the service manual for these frequent M50 issues: How to Update the Operating System on the M50 - Korg : Some advanced users perform a "Power Supply