00castle 0 Posted June 9, 2021 I have acquired a used MH-721 MK2. It powers on but only displays a line across the LCD and the stepper motors all engage but don't move. The carriage also lowers, when it does this I can't turn any of the steppers. No response from the TouchPad on the LCD. Attached is what the screen looks like. Any help would be greatly appreciated. Share this post Link to post Share on other sites
darcshadow 1,626 Posted June 9, 2021 Most likely mother board is fried and you'll need to get a new one. Share this post Link to post Share on other sites
