BenQ Portable Entertainment Series User Manual page 115

Problem
Image or audio is unstable.
Picture is blurred.
Remote control does not work correctly.
The projector cannot find the desired SSID.
Cause
The connection cables are not securely
connected to the projector or the signal
source.
The Internet bandwidth is limited or
over-occupied.
The projector is out of effective range of
Bluetooth connection.
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 radio frequency of the router is out of
range.
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Remedy
Correctly connect the cables to the appropriate
terminals.
Connect to another wireless AP or to an Internet
channel of better speed.
Make sure the projector is within the effective range of
Bluetooth connection.
Make sure there is as less radio frequency interference
as possible when using a 2.4G network.
Adjust the focus of the lens using focus key 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 router's SSID is at
channel 1 to 11.
• For 5G frequency (A and C SKU), make sure the
router's SSID is at channel 36, 40, 44, 48, 149, 153,
157 or 161.
• For 5G frequency (E SKU), make sure the router's
SSID is at channel 36, 40, 44 or 48.