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TROUBLESHOOTING
Problem & Question
Power LED is not on
No Plug & Play
Picture is fuzzy
Picture bounces or a wave pattern
is present in the picture
The power LED is ON (blue) but
there is no video or no picture�
Missing one of the primary colors
(RED, GREEN, or BLUE)
Screen image is not centered or
sized properly�
Picture has color defects (white
does not look white)
Poor brightness or contrast
Horizontal or vertical disturbances
on the screen
CLOCK (pixel frequency) controls the number of pixels scanned by one horizontal
sweep� If the frequency is not correct, the screen shows vertical stripes and the picture
does not have correct width�
PHASE adjusts the phase of the pixel clock signal� With a wrong phase adjustment the
picture has horizontal disturbances in light picture�
For PHASE and CLOCK adjustment best to use "dot-pattern"�
• Check if the Power Switch is in the ON position�
• Power Cord should be connected�
• Check if the PC system is Plug & Play compatible�
• Check if the Video Card is Plug & Play compatible�
• Check if the D-15 plug pin of Video Cable is bent�
• Adjust the Contrast and Brightness Controls�
• Move electrical devices that may cause electrical
interference�
• Computer Power Switch should be in the ON position�
• Computer Video Card should be snugly seated in its
slot�
• Make sure monitor's video cable is properly connected
to the computer�
• Inspect monitor's video cable and make sure none of
the pins are bent�
• Make sure computer is operational by pressing the
CAPS LOCK key on the keyboard while observing the
CAPS LOCK LED� The LED should either turn ON or
OFF after pressing the CAPS LOCK key�
• Inspect the monitor's video cable and make sure that
none of the pins are bent�
• Adjust pixel frequency (CLOCK) and PHASE or press
hot-key (auto adjustment)�
• Adjust RGB color or select color temperature�
• When the brightness of the screen lowers after being
used for a certain period and the function of the display
is affected, send it to our authorized service center for
repair�
• Adjust CLOCK and PHASE or perform hot- key (auto
adjustment)�
15
Possible Solution
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