Troubleshooting, Eng lish – BenQ PE8720 User Manual
Page 35
35
Additional information
Eng
lish
Troubleshooting
Problem
Cause
Remedy
The projector does
not turn on.
There is no power from the power
cable.
Plug the power cable into the AC inlet on the
rear of the projector, and plug the power
cable into to the power outlet. If the power
outlet has a switch, make sure that it is
switched on.
(See page 19)
The power switch is not in the on
position.
Put the power switch in the on position.
(See
page 19)
Attempting to turn the projector on
again during the cooling process.
Wait until the cooling down process has
completed.
The lamp cover is not securely
attached.
Correctly attach the lamp cover.
(See page
33)
No picture.
The video source is not turned on or
connected correctly.
Turn the video source on and check that the
signal cable is connected correctly.
(See page
17)
The projector is not correctly
connected to the input source device.
Check the connection.
(See page 17)
The input signal has not been
correctly selected.
Select the correct input signal with the
Source buttons on the remote control or
SOURCE / ENTER on the projector.
(See
page 19)
Image is unstable.
The connection cables are not
securely connected to the projector or
the signal source.
Correctly connect the cables to the
appropriate terminals.
(See page 17)
Picture is blurred.
The projection lens is not correctly
focused.
Adjust the focus of the lens using the focus
ring.
(See page 20)
The projector and the screen are not
aligned properly.
Adjust the projection angle and direction as
well as the height of this unit if necessary.
(See page 19)
The lens cap is still attached to the
lens
Remove the lens cap.
(See page 19)
Remote control does
not work correctly
The batteries are out of power.
Replace both of the batteries with new ones.
(See page 9)
There is an obstacle between the
remote control and the projector.
Remove the obstacle.
(See page 13)
You are too far away from the
projector.
Stand within 8 meters (26.2 feet) of the
projector.
(See page 13)
PE8720-en.book Page 35 Friday, May 13, 2005 5:19 PM