Appendix A Troubleshooting; Solving Common Problems - HP EF224A4 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.
Out of Range. Set
Monitor to 1280 × 1024
@ 60Hz is displayed on
screen. (LP1965 19" model)
Out of Range. Set
Monitor to 1600 × 1200
@ 60Hz is displayed on
screen. (LP2065 20" model)
Out of Range. Set
Monitor to 1920 × 1200
@ 60Hz is displayed on
screen. (LP2465 24" model)
Possible Cause
Power cord is disconnected.
Power switch 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.
Position may need adjustment.
Monitor video cable is
disconnected.
Video resolution and/or refresh
rate are set higher than what the
monitor supports.
Video resolution and/or refresh
rate are set higher than what the
monitor supports.
Video resolution and/or refresh
rate are set higher than what the
monitor supports.
Solution
Connect the power cord.
Press the front panel power button.
Turn the master power switch to On.
Connect the video cable properly. Refer to Chapter 3,
Setting Up the Monitor for more information.
Press any key on the keyboard or move the mouse to
inactivate the screen blanking utility.
Press the —/Auto button on the front panel. If this does
not correct the image, press the Menu
Basic OSD 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 DVI-D signal cable to the DVI-I connector
on the computer, or the VGA to DVI-I cable to the DVI-I
connector on the computer. 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
Model Factory Preset Modes). Restart the computer so
that the new settings take effect.
Restart the computer and enter Safe Mode. Change the
settings to a supported setting (see
Model Factory Preset Modes). Restart the computer so
that the new settings take effect.
Restart the computer and enter Safe Mode. Change the
settings to a supported setting (see
Model Factory Preset Modes). Restart the computer so
that the new settings take effect.
Solving Common Problems
button to open the
or Vertical Position to
Table B-4 LP1965
Table B-5 LP2065
Table B-6 LP2465
33