Your monitor provides a self test feature that allows you to check whether your monitor is functioning properly. If your monitor and computer are properly connected but the monitor screen remains dark, run the monitor self test by performing the following steps:
If your monitor screen remains blank after you use the previous procedure, check your video controller and computer system; your monitor is functioning properly.
The following table contains general information about common monitor problems you might encounter.
COMMON SYMPTOMS |
PROBLEM DESCRIPTION |
POSSIBLE SOLUTIONS |
| No Video/Power LED off |
No picture, monitor is dead |
- Check connection integrity at the both ends of the video cable
- Ensure that the monitor and computer are plugged into an electrical outlet
- Ensure power button depressed fully
|
| No Video/Power LED on |
No picture or no brightness |
- Increase brightness & contrast controls
- Perform monitor self test feature check
- Check for bent or broken pins on the end of the video cable
- Reboot your computer and monitor
|
| Poor Focus |
Picture is fuzzy, blurry or ghosting |
- Eliminate video extension cables
- Perform monitor reset
- Decrease brightness & contrast controls
- Lower video resolution or increase font size
|
| Shaky/Jittery Video |
Wavy picture or fine movement |
- Perform monitor reset
- Check environmental factors such as nearby florescent lights or other high power draw appliances plugged into the same AC circuit
- Relocate and test in another room
|
Missing Color or
Color Flood |
Entire screen is purple or yellow
Entire screen is red, green or blue |
- Perform monitor reset
- Perform monitor self test feature check
- Check for bent or broken pins
- Reseat the video cable
|
| Missing Pixels |
CRT screen has spots, specs or blemishes on the glass |
- If the blemish is on the outside of the glass, try cleaning the CRT screen
|
| Brightness Problems |
Picture too dim or too bright |
- Perform monitor reset
- Adjust brightness & contrast controls
|
| Geometric Distortion |
Screen not sized, shaped or centered correctly |
- Perform monitor reset
- Adjust the centering controls
- Ensure monitor is in proper video mode
|
| Moiré (Thin Curvy Lines) |
Screen has wavy or elliptical lines
Screen has wood grain patterns |
- Ensure monitor is in proper video mode
- Adjust size first then the moiré controls
|
| Sync Problems |
Screen is scrambled or appears torn |
- Perform monitor reset
- Perform monitor self test feature check
- Check for bent or broken pins on the end of the video cable
- Boot up in the "safe mode"
|
| Audible Noise Problems |
Has humming sound or high frequency squeal |
- Ensure monitor is in proper video mode
- Reposition the monitor
- Loud hum when turning on or degaussing is normal
|
| CRT Scratched |
Screen has scratches or smudges |
- Turn monitor off and clean the screen
|
| Safety Related Issues |
Visible signs of smoke or sparks |
- Do not perform any troubleshooting steps
- Monitor needs to be replaced
|
| Intermittent Problems |
Monitor malfunctions on and off |
- Ensure monitor is in proper video mode
- Perform monitor reset
- Perform monitor self test feature check
|
| SPECIFIC SYMPTOMS |
WHAT YOU EXPERIENCE |
POSSIBLE SOLUTIONS |
| No video / LED is blinking green |
No picture |
- The monitor is using its power management system - See Power Management Modes
- Press a key on the keyboard or move the mouse
|
| Screen image is too large or too small |
Image extends beyond the edges of the screen, or the image is surrounded by a thick black border |
- Adjust the Zoom setting
- Use the H-Size and/or V-Size controls to adjust the size of the image on the screen
|
| Cannot adjust the monitor with the buttons on the front panel |
OSD does not appear on the screen |
- Turn the monitor off and then on again
|
| White does not look white |
White areas on the screen image appear to have a bluish or reddish cast |
|
Moiré is a type of natural interference which produces soft or wavy lines on your screen. It may appear due to interference between the regulated pattern of the picture from the input signal and the phosphor pitch pattern of the CRT. This is not a defect.
