Troubleshooting - BenQ MP723 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 source device.
The input signal has not been
correctly selected.
The lens cover is still closed.
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 batteries are 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.
60 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.
Open the lens cover.
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 batteries with new ones.
Remove the obstacle.
Stand within 8 meters (26 feet) of the
projector.
Remedy
Please see "Entering the password recall pro-
cedure" on page 30 for details.