my 3d printer isn't working any more. all 3 axis have full range of movement. the bl touch works correctly. the bed and end heat correctly. I haven't updated the firmware and it can't connect to the Internet (normal). it can read the contents of the SD card. whenever I try to print it will heat up, auto home and then stop. the progress will count up and after a few mins it'll say print done. I thought the model exported wrong but models from months suddenly don't work either. 3d printing isn't my hobby it's a regrettable purchase that I rarely find uses for but now it's not working