TROUBLESHOOTING

Before sending your LCD monitor for servicing, please check the trouble- shooting list below to see if you can self-diagnose the problem.

(VGA Mode)

Problems

Current Status

Remedy

 

 

 

 

LED ON

· Using OSD, adjust brightness and contrast

 

 

 

to maximum or reset to their default

 

 

 

settings.

 

 

 

 

 

LED OFF

·

Check the power switch.

 

 

 

No Picture

 

· Check if AC power cord is properly

 

 

connected to the monitor.

 

 

 

 

 

 

 

LED displays

· Check if video signal cable is properly

 

amber color

 

connected at the back of monitor.

 

 

 

 

 

· Check if the power of computer system is

 

 

 

ON.

 

 

 

 

Unstable

· Check if the specification of graphics

 

Picture

 

adapter and monitor is in compliance

 

 

 

which may be causing the input signal

 

 

 

frequency mismatch.

 

 

 

 

 

Display is

·

Using OSD, adjust RESOLUTION, CLOCK,

 

missing, center

 

CLOCK-PHASE, H-POSITION and V-

Abnormal

shift, or too

 

POSITION with non-standard signals.

small or too

 

 

Picture

·

Using OSD, in case of missing full-screen

large in display

 

 

 

image, please select other resolution or

 

size

 

 

 

other vertical refresh timing.

 

 

 

 

 

 

 

 

· Wait for a few seconds after adjusting the

 

 

 

size of the image before changing or

 

 

 

disconnecting the signal cable or powering

 

 

 

OFF the monitor.

 

 

 

 

EN-19

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Acer ADPC1940-EN-3, F PS 040- RAB, DA-40A19 manual Troubleshooting, EN-19