|Wii remote not turning on||
Check Battery Contacts.
If device is not taking power:
If it is unreliable, or if there is battery acid on the plate, remove the spring from the plate, and put it in a small container of white vinegar.
If there is a large amount of acid on the plate, it might be best to remove the plate and put it in white vinegar.
Resolder the plate back onto the logic board.