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The device control panel display has black lines or dots, or
becomes blank
CAUTION Static electricity can cause unexpected black lines or dots 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).
Was the device exposed to an electric or magnetic field?
Unexpected lines or dots 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.
194 Chapter 14 Problem solving ENWW