AOC LM560/s User Manual

TECHNICAL SUPPORT (FAQ)

Problem & Question

Possible Solution

Power LED is not on

*Check if the Power Switch is in the ON

position

*Power Cord should be connected

No Plug & Play

*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

Picture is fuzzy

*Adjust the Contrast and Brightness

Controls.

Picture bounces or a wave

pattern is present in the picture

*Move electrical devices that may cause

electrical interference.

The power LED is ON (orange)

but there’s no video or no

picture.

*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

hitting the CAPS LOCK key on the

keyboard while observing the CAPS

LOCK LED. The LED should either

turn ON or OFF after hitting the CAPS

LOCK key.

Missing one of the primary

colors (RED, GREEN, or

BLUE)

*Inspect the monitor’s video cable and

make sure that none of the pins are

bent.

Screen image is not centered or

sized properly.

*Adjust pixel frequency (CLOCK) and

FOCUS or press hot-key (AUTO).

Picture has color defects

(white does not look white)

*Adjust RGB color or select color

temperature.

Horizontal

vertical

disturbances on the screen

*Use win 95/98 shut-down mode Adjust

CLOCK and FOCUS or perform hot- key

(AUTO-key).

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 has not correct width.

FOCUS adjusts the phase of the pixel clock signal. With a wrong phase
adjustment the picture has horizontal disturbances in light picture.

For FOCUS and CLOCK adjustment use “dot-pattern” or win 95/98 shut-
down mode pattern.