Yamaha TG77 Expander Rack - Battery Replacement RequiredThe aesthetic condition is truly excellent, with very few signs of wear. The module functions perfectly in terms of sound, and the display is perfectly readable. However, it’s necessary to replace the internal battery. Otherwise, to use it, you’ll need to perform a factory reset each time you start the machine in order to use the presets without the ability to save them.

If you have any further questions or need additional information, feel free to ask! 😊