This is old thread, but maybe someone know the answer? I have Davinci AIO also, with repetier 0.92.10 firmware. The same problem happened to me second time (maybe after autoleveling) - printer heats up, cleans the nozzle and do nothing, but Repetier host show printing and very fast. Problem was solved before by power cycling PC and printer maybe 10 times, manually re-leveling the bedand rechecking all things 10 times. Now this not helps... Dry run does not heats up printer, so this is not the case. So maybe someone know what can be wrong there?
It look like printer does not react to G1 codes, but G28 work fine, all axes do homing cycle