AOC LM722 installation instructions Technical Support FAQ, Red

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
					*Make sure the LCD Monitor Drivers are
					installed
Picture is fuzzy					*Adjust the Contrast and Brightness Controls.
Picture	bounces		or	a	*Move electrical devices that may cause
wave pattern is present in					electrical interference.
the picture
The power LED is ON					*Computer Power Switch should be in the ON
(orange)	but	there’s		no	position.
video or no picture.					*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	*Inspect the monitor’s video cable and make
primary	colors		(RED,		sure that none of the pins are bent.
GREEN, or BLUE)
Screen image is not					*Adjust pixel frequency (CLOCK) and FOCUS or
centered or sized properly.					press hot-key (AUTO)
Picture has color defects					*Adjust RGB color or select color temperature
(white does not look white)
Poor brightness or contrast					*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.
Horizontal or vertical					*Use win 95/98 shut-down mode Adjust CLOCK
disturbances on the screen					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.

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