Troubleshooting - HP L1940T Series Service Manual

8. Troubleshooting

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) is
displayed
on screen.
Possible Cause
Power cord is disconnected.
Power switch is turned Off.
Video cable is improperly connected.
Screen blanking utility is active.
Brightness and contrast are too low
Position may need Adjustment
Monitor video cable is disconnected.
refresh rate are set higher than what your
monitor supports.
Solution
Connect the power cord.
Turn on the power.
Connect the video cableproperly.
Depress any key on the keyboard or moveThe mouse to inactivate the screen
blanking Utility.
Press the Minus button on the monitor front panel to auto-adjust the screen. If
that
Does not work, press the Menu button to open the Basic OSD Menu, and adjust
the brightness and contrast scales as needed.
When OSD is inactive,press-(minus. button) to auto-adjust the screen image.
Press the Menu button to access the Advanced OSD menu. Select Image
Control/Horizontal Position or Vertical
Position to adjust the horizontal or vertical position of the image.
Connect the 15-pin monitor video cable to the VGA connector on the computer.
Be sure that the computer power is off while: connecting the video Cable.
Restart your computer and enter Windows
Safe Mode by pressing the F6 Function
key when the computer starts to boot up.
Change your settings to a supported
setting. Restart your computer so that the
new settings take effect.
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HP L1940T