I have a HPS10 that is currently stuck with a black bar running down the left of the screen with a dot in the middle. The menu functions etc work fine and the demo mode proves the screen to be working properly. I tried the full reset method without any change. When i hit auto the voltage range selects 20V/div. Is this possibly damaged/broken? Is there a voltage protection fuse somewhere that needs replacement?
This looks like an overvoltage problem. Probably the input section is damaged. As the unit is not user-serviceable, you can return your scope to:
Velleman Instruments Tech. Dept.
Legen Heirweg 33
9890 Gavere
Belgium