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HP 21” Color Monitor User’s Guide
Troubleshooting
Troubleshooting
Refer to this section, before contacting technical support.
If thin lines appear on your screen (damper wires)
The lines you are experiencing on your screen are normal for the
Trinitron monitor and are not a malfunction. These are shadows from
the damper wires used to stabilize the aperture grille and are most
noticeable when the screen’s background is light (usually white). The
aperture grille is the essential element that makes a Trinitron picture
tube unique by allowing more light to reach the screen, resulting in a
brighter, more detailed picture.
On-screen messages
If there is something wrong with the input signal, one of the following
messages appears on the screen.
If NO INPUT SIGNAL appears on the screen
This message shows the currently selected INPUT.
NO INPUT SIGNAL. This indicates that no signal is input
from the selected connector.
Damper wires
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