I need some help. I bought a 70d off Craigslist. Whenever I try and take a picture I get error code 70. The previous owner had magic lantern and I believe this is what caused the use. I'm pretty sure the boot flag is set and I can't turn it off because the the camera's running firmware 1.1.1 and I only found downloads for 1.1.2. I tried updating to 1.1.2 but the camera just turns off when I do this. What can I do?