BenQ W770ST Troubleshooting, switched on. See page, ring. See page, necessary. See page

Troubleshooting

Problem	Cause	Remedy
		Plug the power cable into the AC inlet on the
	There is no power from the power	rear of the projector, and plug the power
		cable into to the power outlet. If the power
	cable.
		outlet has a switch, make sure that it is
The projector does
		switched on. (See page 22.)
not turn on.
	Attempting to turn the projector on	Wait until the cooling down process has
	again during the cooling process.	completed.
	The lamp cover is not securely	Correctly attach the lamp cover. (See page
	attached.	49.)
	The video source is not turned on or	Turn the video source on and check that the
		signal cable is connected correctly. (See page
	connected correctly.	19.)
No picture.	The projector is not correctly	Check the connection. (See page 19.)
	connected to the input source device.
	The input source has not been	Select the correct input source with the
		Source keys on the remote control or
	correctly selected.
		SOURCE on the projector. (See page 23.)
	The connection cables are not	Correctly connect the cables to the
Image is unstable.	securely connected to the projector
		appropriate terminals. (See page 19.)
	or the signal source.
	The projection lens is not correctly	Adjust the focus of the lens using the focus
	focused.	ring. (See page 23.)
Picture is blurred.
	The projector and the screen are not	Adjust the projection angle and direction as
	aligned properly.	well as the height of this projector if
		necessary. (See page 27.)
	The batteries are out of power.	Replace both of the batteries with new ones.
		(See page 7.)
Remote control does
	There is an obstacle between the	Remove the obstacle. (See page 7.)
not work correctly.	remote control and the projector.
	You are too far away from the	Stand within 8 meters (26.2 feet) of the
	projector.	projector. (See page 7.)
	The 3D glasses are out of battery.	Recharge the 3D glasses.
	The settings in the 3D menu are not	Correctly set the settings in the 3D menu.
	set correctly.	(See page 37.)
3D content does not
	Your Blu-ray Disc is not in 3D	Use a 3D Blu-ray Disc and try again.
not display correctly	format.
	The input source has not been	Select the correct source with the Source
		keys on the remote control or SOURCE on
	correctly selected.
		the projector. (See page 23.)

54 Using the projector