The small flat silver thingy is known to technical people as a 'fuse'. The side of the case is known as 'grounded'. The screw is known as a 'short'. The result is know as 'not good'

The likelyhood is that either the fuse has blown permanently, or a track or one of the protection diodes has burned out. These are all repairable faults, but will require the PCB to be removed and carefully checked.

pca