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HP LA1751g and LA1951g LCD Monitors - Troubleshooting

Solving Common Problems

The following table lists possible problems, the possible cause of each problem, and the recommended solutions.

Possible Cause
Screen is blank.
Power cord is disconnected.
Connect the power cord.
Power button on front panel of the monitor is turned off.
Press the front panel power button.
If pressing the power button has no effect, press and hold the power button for 10 seconds to disable the power button lockout feature.
Video cable is improperly connected.
Connect the video cable properly. Refer to Chapter 3, Setting Up the Monitor for more information.
Screen blanking is active.
Press any key on the keyboard or move the mouse to inactivate the screen blanking utility.
Screen image appears distorted; text is fuzzy or blurred; image quality is degraded.
The computer’s graphics card resolution is set lower or higher than the monitor’s native resolution.
Set the computer’s display resolution to the same mode as the monitor’s recommended native screen resolution to provide the best picture quality.
Image appears blurred, indistinct, or too dark.
Brightness and contrast are too low.
Press the —/Auto button on the front panel. If this does not correct the image, press the Menu button to open the OSD Menu, and adjust the brightness and contrast scales as needed.
Image is not centered
Position may need adjustment.
Press the Menu button to access the OSD menu. Select Image Control/Horizontal Position or Vertical Position to adjust the horizontal or vertical position of the image.
Check Video Cable is displayed on screen.
Monitor video cable is disconnected.
Connect the DVI-D signal cable to the DVI connector on the computer, or the VGA cable to the VGA connector on the computer. Be sure that the computer power is off while connecting the video cable.
Input Signal Out of Range. Change Settings to 1280 x 1024 @ 60Hz is displayed on screen.
Video resolution and/or refresh rate are set higher than what the monitor supports.
Restart the computer and enter Safe Mode. Change the settings to a supported setting (see Recognizing Preset Display Resolutions ). Restart the computer so that the new settings take effect.
HP Display LiteSaver doesn't turn off the monitor screen.
The Activity Extension time has not elapsed.
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 monitor enters into low-power mode. For example, if the Display Off time is set to 5 minutes from the current time and the Activity Extension is set to 10 minutes, the HP Display LiteSaver will not actually turn off the display until 10 minutes of inactivity has elapsed, even though the Display Off time is 5 minutes from now.
The HP Display LiteSaver may not be compatible with the computer system. Some notebook computers are not compatible and the monitor power can not be controlled.
Confirm that the HP Display LiteSaver is compatible with the system.
  1. Right-click on the HP Display LiteSaver icon in the system tray.

  2. Select Power Off Display from the menu.

The monitor screen should turn off if the system is compatible. To turn the monitor back on, wait 5 seconds and move the mouse.
If the monitor did not turn off, then the computer graphics driver is not compatible with the HP Display LiteSaver software.
The monitor is off but it did not seem to enter into a low-power sleep mode.
The monitor's power saving control is disabled.
Check the monitor's OSD menu setting for power saving enable/disable controls. The control should be set to enable to allow the monitor to enter into low-power modes.
OSD Lockout is displayed.
The monitor's OSD Lockout function is enabled.
Press and hold the Menu button for 10 seconds to disable the OSD Lockout function.
Power Button Lockout is displayed.
The monitor's Power Button Lockout function is enabled.
Press and hold the power button for 10 seconds to unlock the power button function.

Online Technical Support

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Preparing to Call Technical Support

If you cannot solve a problem using the troubleshooting tips in this section, you may need to call technical support. Have the following information available when you call:

  • Monitor model number

  • Monitor serial number

  • Purchase date on invoice

  • Conditions under which the problem occurred

  • Error messages received

  • Hardware configuration

  • Name and version of the hardware and software you are using

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