BenQ Portable Series User Manual page 64

Problem
Picture is blurred.
Remote control does not work correctly.
The projector cannot connect to the desired
SSID.
Cause
The projection lens is not correctly focused.
The projector and the screen are not
aligned properly.
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 handshaking between the projector and
the router does not follow IEEE 802.11
protocols.
64
Remedy
Adjust the focus of the lens using focus button on the
remote control.
Adjust the projection angle and direction as well as the
height of this projector if necessary.
Replace both of the batteries with new ones.
Remove the obstacle.
Stand within 8 meters (26.2 feet) of the projector.
• For 2.4G frequency, make sure the wireless mode of
the router is configured as 802.11g/n or 802.11n.
• For 5G frequency, make sure the wireless mode of
the router is configured as 802.11n.