Troubleshooting - HP L1744A User Manual

7. Troubleshooting

The projector does not turn on.
Cause
There is no power from the power
cord.
Attempting to turn the projector on
again during the cooling process.
No picture
Cause
The video source is not turned on.
The projector is not correctly
connected to the input source device.
The input signal has not been
correctly selected.
The lens cap is still attached to the
lens.
Blurred image
Cause
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
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.
For a PC connection, the USB cable is
not connected.
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.
Check that the signal cable is connected
correctly.
Select the correct input signal with the source
button on the projector or remote control.
Remove the lens cap.
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.
Remove the lens cap.
Remedy
Replace the battery in the remote control with
a new one.
Remove the obstacle.
Stand within 6 meters (19.5 feet) of the
projector.
To use the page up and page down functions,
connect the USB cable between the PC and
projector.
7. Troubleshooting 35