hey sorry I haven't updated this for the longest. I actually don't have the eos m anymore with me, but what I did was just simply purchase a new LCD online and then installed it myself. It's pretty easy to take apart while following a tear down guide...
hey, I don't have the camera anymore. Although I did fix it before selling it. I simply just purchased a replacement screen, and then took the camera apart and replaced the broken screen with the new. The new screen was fairly cheap.
Sorry to dig this up, but did you find a solution? This same exact issue happened to my eos-m today. Powers on, can still shoot, touch screen enabled but nothing shows up on the screen.