I flipped when my M3 Perfect stopped working. All I was getting was a black screen. I finally got around to thinking the battery might be the problem but I couldn't find the battery with the solder tabs so I ordered a new battery without them then I pried off the battery from the solder tabs leaving them on the card and I cut off the plastic around the battery. I then put the plastic on the new battery and placed it in the card without soldering. It worked perfectly and now when I change the battery on my M3 I don't have to bother with the soldering iron. The point is I've read a lot of threads where people were getting black screens on the M3 perfect. The battery is most likely the cause and there is an easy fix.