Troubleshooting - BenQ PE7800 User Manual

Troubleshooting

Problem
The projector does
not turn on.
No picture.
Image is unstable.
Picture is blurred.
Remote control does
not work correctly
LAMP light flashes
red.
POWER indicator
light flashes orange
and green
sequentially.
Cause
There is no power from the power
cable.
The power switch is not in the on
position.
Attempting to turn the projector on
again during the cooling process.
The front lamp cover is not securely
attached.
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 input signal has not been
correctly selected in the "INPUT
SOURCE" item in the DISPLAY
menu.
POWER light or LAMP indicator
light flashing.
The connection cables are not
securely connected to the projector
or the signal source.
The projection lens is not correctly
focused.
The projector and the screen are not
aligned properly.
The lens cap is still attached to the
lens
The batteries are out of power.
The front lamp cover is not correctly
attached.
The cooling fan is not working
properly.
The temperature inside the projector
is extremely high.
The ambient temperature is too high
(above 35°C / 95°F).
The lamp has exceeded its specified
usage time.
The lamp has burned out.
Remedy
Plug the power cord into the AC inlet on the
rear of the projector, and plug the power
cord into to the power outlet. If the power
outlet has a switch, make sure that it is
switched on.
Put the power switch in the on position.
Wait until the cooling down process has
completed.
Correctly attach the front lamp cover.
Turn the video source on and check that the
signal cable is connected correctly.
Check the connection.
Select the correct input signal with the
INPUT keys: Component 1, Component 2,
DVI-D, DVI-A, Video and S-Video on the
remote control.
Select the correct input signal.
Please contact your BenQ dealer for
assistance.
Correctly connect the cables to the
appropriate terminals.
Adjust the focus of the lens using the focus
ring.
Adjust the projection angle and direction as
well as the height of this unit if necessary.
Remove the lens cap.
Replace both of the batteries with new ones.
Correctly attach the front lamp cover.
Please contact your BenQ dealer for
assistance.
Check that the ventilation holes are not
blocked.
Wait until the room cools down or move the
projector to a cooler loaction.
Replace the lamp with a new one.
Replace the lamp with a new one.
Additional Information 33