Hi I hope you can help me this is my first post and its a plea for help :) I have a Heidenhain DRO quite an old model 731b the x axis has developed a fault its not the scales as I can swap them around and they both work fine on the y axis. The fault is the display will jump around and read all over the place it does move up and down but just flickers up and down. I'm thinking its possibly a voltage issue. Has anyone out there seen fixed this before ?