I bought this sawzall used and the first time I used it it worked as it should've but the next time I went to cut something it cut for a few seconds and then stopped,then would start and stop sporadically and now the led is flashing a diagnostic code of 4 flashes.I've read about Milwaukee trigger issues and this sounds like it might fall into that category but I can't find any information about the fault codes. What's the general consensus?