Appendix A Troubleshooting; Solving Common Problems - HP LP2275w User Manual

A Troubleshooting

Solving Common Problems

The following table lists possible problems, the possible cause of each problem, and the recommended
solutions.
Problem
Screen is blank.
Image appears blurred,
indistinct, or too dark.
Image is not centered
Check Video Cable is
displayed on screen.
Input Signal Out of Range.
Change resolution setting
to 1680 × 1050 @ 60Hz (HP
LP2275w Model) or Input
Signal Out of Range.
Change resolution setting
to 1920 × 1200 @ 60Hz (HP
LP2475w Model) is
displayed on screen.
HP Display LiteSaver
doesn't turn off the monitor
screen.
Possible Cause
Power cord is disconnected.
Power button on front panel of the
monitor is turned off.
Master power switch on rear panel
of the monitor is turned Off.
Video cable is improperly
connected.
Screen blanking is active.
Brightness and contrast are too low. Press the
Position may need adjustment.
Monitor video cable is
disconnected.
Video resolution and/or refresh rate
are set higher than what the monitor
supports.
The Activity Extension time has not
elapsed.
Solution
Connect the power cord.
Press the front panel power button.
NOTE: If pressing the power button has no effect, press
and hold the power button for 10 seconds to disable the
power button lockout feature.
Turn the master power switch to On.
Connect the video cable properly. Refer to
Monitor on page 6 for more information.
Press any key on the keyboard or move the mouse to
inactivate the screen blanking utility.
—/Auto button on the front panel. If this does not
correct the image, press the
Menu, and adjust the brightness and contrast scales as
needed.
Press the Menu button to access the OSD menu. Select
Image Control/Horizontal Position
adjust the horizontal or vertical position of the image.
Connect the appropriate video signal cable between the
computer and monitor. Be sure that the computer power is
off while connecting the video cable.
Restart the computer and enter Safe Mode. Change the
settings to a supported setting (see
Display Resolutions on page
so that the new settings take effect.
The default Activity Extension value is set to 10 minutes.
The HP Display LiteSaver will wait to detect no input or
movement from the keyboard or mouse for 10 consecutive
minutes after the Display Off time has passed, before the
Solving Common Problems
Setting Up the
Menu button to open the OSD
or Vertical Position to
Recognizing Preset
41). Restart the computer
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