HP L1740 
18 
8. Troubleshooting    
 
Problem  Possible Cause  Solution 
Screen is blank. 
 
Power cord is disconnected. 
Power switch is turned Off. 
Video cable is improperly connected. 
Screen blanking utility is active. 
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. 
Image appears.blurred, indistinct, 
or too dark. 
 
 
Brightness and contrast are too low  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. 
Image is not Centered. 
 
 
Position may need Adjustment 
 
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. 
Check Video Cable is displayed 
on screen. 
Monitor video cable is disconnected. 
 
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. 
(Input Signal Out of Range) is 
displayed 
on screen. 
 
 
refresh rate are set higher than what your
monitor supports. 
 
 
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.