HP LaserJet M1005 Multifunction Printer series - Manual (Page 107)

Control-panel display problems
CAUTION: Static electricity can cause unexpected black lines, dots, or characters to appear on the
device control-panel display. Do not touch the device 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-humidity environment).
Unexpected lines, dots, or characters might appear on the device control-panel display, or the display
might become blank if the device is exposed to an electric or magnetic field. To resolve this problem,
perform the following procedure:
1. Turn the device off.
2. Remove the device from the electric or magnetic field.
3. Turn the device on again.
ENWW Control-panel display problems 97