Hi.

I am new but I have one of these printers and been messing with it for the last few weeks. Sounds like the MosFET has failed and its locked in a on state. Had the same issue. HIC have been good to me in the past.

Next thing to do once you start printing is print a 25x25 cube and find the right settings as mine printed a few cm to big so had to edit it a little to get it right