Troubleshooting - BenQ MH741 User Manual

Troubleshooting

The projector does not turn on.
Cause
There is no power from the power cable.
Attempting to turn the projector on again
during the cooling process.
No picture.
Cause
The video source is not turned on or
connected correctly.
The projector is not correctly connected
to the input signal device.
The input signal has not been correctly
selected.
Blurred image.
Cause
The projection lens is not correctly
focused.
The projector and the screen are not
aligned properly.
The lens cover is still closed.
Remote control does not work.
Cause
The battery is out of power.
There is an obstacle between the remote
control and the projector.
You are too far away from the projector.
The password is incorrect.
Cause
You do not remember the password.
64 Troubleshooting
Remedy
Plug the power cord into the AC inlet on the
projector, and plug the power cord into the
power outlet. If the power outlet has a switch,
make sure that it is switched on.
Wait until the cooling down process has
completed.
Remedy
Turn the video source on and check that the signal
cable is connected correctly.
Check the connection.
Select the correct input signal with the SOURCE
key on the projector or remote control.
Remedy
Adjust the focus of the lens using the focus ring.
Adjust the projection angle and direction as well
as the height of the unit if necessary.
Open the lens cover.
Remedy
Replace the battery with new one.
Remove the obstacle.
Stand within 7 meters (23 feet) of the projector.
Remedy
Please see "Entering the password recall
procedure" on page 30 for details.