I am currently trying to assist my kids school set up 2 C2 3D printers. They have been sitting in the boxes for about 2 years or so now because nobody there attempted to set them up. One unit boots fine. The 2nd unit does not boot. I swapped the SD Micro cards and the one functional units SD Micro card can boot both units. I've attempted 3 reimages per the online instructions and have exhausted all my patience. Is there any config file that needs tweaking or is this an older image file that I need? Thank you in advance for any assistance.