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Maintenance and Troubleshootin
g
Connect correctly.
Ad
j ust the volume.
Remove obstacle between
contrast settin
g .
Note ： Althou g h bri g ht spots or dark spot may appear on the screen ,this is a
unique characteristic of liquid crystal disp lays,and it does not constitute or imply
a machine defect.
55
Symptom
Possible cause Remedy
The power is
not turned on
The main power switch is not
turned on.
The power cord is
disconnected.
Turn on the main power
switch.
Plug the power cord into
an AC power outlet
No video
The input is not correctly
connected.
No signal input.
No open lens cover.
Select the appropriate input
source.
Remove the lens cover.
No audio
The projector is not correctly
connected.
The volume is set to minimum.
Mute is turned on.
Check audio cable connect
correctly.
Press the MUTE button.
No remote
function
No battery.
Remote signal be obstructed
Check battery of remote
controller.
projector and remote
controller.
Colors are
pale
Color density and color
matching are not correctly
adjusted.
Color lose.
Adjust the RGB setting.
Check VGA cable.
Abnormal
brightness
& contrast
Brightness and contrast are
not correctly adjusted.
The lamp is nearing the end
of its service life.
Adjust the brightness and
Replace with a new lamp.
Video is
blurred
Focus or RGB phase is out of
adjustment.
Adjust the focus and phase.