Sometimes your charger dies or is DOA, it's rare but can happen, this ToolKitRC M7 got faulty wheel encoder (switch for easy word), so had to find a way for fixing it. In this video you'll see how to disassemble and assemble, fix the button and replace encoder.
Encoder model is: CEN652812R01 it will work with ISDT, HOTA and other similar chargers!
Over all this is another great charger by ToolKitRC.
GaN PSU: https://api.racer.lt/7gs3 - nice to have for all needs at the bench.
HOTA D6 Pro: https://api.racer.lt/7h7s
Extension cables: https://api.racer.lt/7hk6
Balance cable: https://api.racer.lt/7hk7
All S sizes: https://api.racer.lt/7hk8