The long journey of restoring a Roland D-50
Repair a SONY DSC-P93 that has stuttering OVF zoom and an error message
Although not regular flooded type, AGM batteries can also be restored by adding water if it's not too far gone.
I restored a Sharp GF-777, replacing all belts and friction wheels, and the pinch roller
Repairing a pair of classic Alesis monitor speakers 维修一对经典的Alesis监听音箱
A Roland XP-80 synthesizer repair writeup