My solution was to oil the rail that the printheads travel back and forth on. Use a light oil (3in1 like ) on a powderless glove that has been washed clean first and rub up and down the rail say every 3-6 mos. When my printheads stalled, they were parked on the left side and had jumped the rail. I lifted the printheads up and put them back on the rail.Everything has been fine since. Don't know why others were so confounded by this problem. With a dry, I think a lot of pressure had to be applied to get them to move and when they did, they jumped the rail. Good luck!