I have the impact wrench M-EW 1050. I only worked with it for a short time and now this has no longer function. I saw that when working one of 2 screws had detached from the side carbon brushes in the handle and screwed them again. Is it possible that I have inserted the carbon brushes again incorrectly from the provided ones afterwards or what possibilities would I still have to check what the cause of the defect is? Does the device have a fuse that probably a Need to be exchanged? I would be grateful for tips.