Acer p166hql Manual De Usuario

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 

No Picture

LED ON 



Using OSD, adjust brightness and 
contrast to maximum or reset to 
their default settings.

LED OFF 



Check the power switch. 



Check if AC power cord is properly 
connected to the monitor. 

LED displays amber color



Check if video signal cable is 
properly connected at the back of 
monitor. 



Check if the power of computer 
system is ON. 

Abnormal 

Picture

Unstable Picture 



Check if the specification of graphics 
adapter and monitor is in 
compliance which may be causing 
the input signal frequency 
mismatch. 

Display is missing, center 

shift, or too small or too 

large in display size



Using OSD, adjust RESOLUTION, 
CLOCK, CLOCK-PHASE, H-POSITION 
and V-POSITION with non-standard 
signals. 



Using OSD, in case of missing full-
screen image, please select other 
resolution or 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. 

Abnormal 

Sound 

(Only Audio-

Input model)

(Optional)

No sound,  or sound level 

is too low



Check the audio cable with the host 
PC is connected. 



Check if the volume setup of the 
host PC is in minimum position and 
try to raise the volume level.