Control-panel display problems
Static electricity can cause unexpected black lines or dots to appear on the all-in-
one control-panel display. Do not touch the all-in-one control-panel display if there is a chance
that you have collected a static electric charge (for example, by walking on carpet in a low-
Unexpected lines or dots might appear on the all-in-one control-panel display, or the display might
become blank if the all-in-one is exposed to an electric or magnetic field. To resolve this problem,
perform the following procedure:
Turn the all-in-one off.
Remove the all-in-one from the electric or magnetic field.
Turn the all-in-one on again.