BOXLIGHT CP755ew User Manual page 51

Symptom Possible cause
*The main power switch is not
The power is
turned on.
not turned on
*The power cord is disconnected.
*The input is not correctly
connected.
No video
*No signal input
*No open lens cover
*The projector is not correctly
connected.
No audio
*The volume is set to minimum.
*Mute is turned on
No remote *No battery
function *Remote signal be obstructed
*Color density and color
Colors are matching are not correctly
pale adjusted.
*Color lose
*Brightness and contrast are not
Abnormal
correctly adjusted.
brightness &
*The lamp is nearing the end of
contrast
its service life
Video is *Focus or RGB phase is out of
blurred adjustment.
Multimedia LCD Projector
Remedy
*Turn on the main power switch.
*Plug the power cord into an AC
power outlet
*Select the appropriate input
source
*Connect correctly
*Remove the lens cover
*Check audio cable connect
correctly.
*Adjust the volume.
*Press the MUTE button
*Check battery of remote
controller
*Remove obstacle between
projector and remote controller
*Adjust the RGB setting.
*Check VGA cable.
*Adjust the brightness and
contrast setting.
*Replace with a new lamp
*Adjust the focus and phase.
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