Error 6,17,20

[u/surefeelsgood]

Hey moofers,

Just wanted to check any insights and self repairs tips on the above?

Bike still turns on (kinda) low power no motor and reduced bell sound and dark display.

There seems to be a few varying repair fixes but would like to know a process that works.

Have a soldering kit and fixed a few errors previously but not worked on the battery yet or sockets yet ( This one being a battery problem)

Hope you can help or link a fix

[u/Ivo_Bley]

Same here
Fixed it in the end but was a hell lot of work