“This OP-1 is in good overall condition and mostly functional, but has some issues:
1) The volume knob does not change the volume. Current volume is set at a useable level but cannot be changed. Volume pot feels wobbly but does turn correctly.
2) Three of the keyboard keys plus the “6” key are not responsive. See photo 11 for a shot of the unit with these four keys removed.
3) Power switch feels sluggish but does work fine every time.
All other controls have great feel and respond accurately. All lights and screen fully functional. All ports and jacks in great shape and connect without issue. Sound is strong and clear from all inputs and outputs. Battery is charging well and holding a charge. No issues mounting the unit as a removable disc on a computer via the USB cable.
The unit passed all practical tests and self-tests with the exceptions of the faults listed above. It has been updated to the most recent 225 operating system.
Sale includes the unit with its original USB cable.
This is being sold as-is, for parts or not working, with no returns. ”
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