BenQ XL2720T User Manual page 13

You should position the monitor and angle the screen to
minimize unwanted reflections from other light sources.
2. Connect the PC video cable
Do not use both DVI-D cable and D-Sub cable on the same
PC. The only case in which both cables can be used is if they
are connected to two different PCs with appropriate video
systems.
To Connect the D-Sub Cable
Connect the plug of the D-Sub cable (at the end
without the ferrite filter) to the monitor video
socket. Connect the other end of the cable (at the
end with the ferrite filter) to the computer video
socket.
Tighten all finger screws to prevent the plugs from
accidently falling out during use.
To Connect the DVI-D Dual Link Cable
Connect the plug of the DVI-D Dual Link cable to
the monitor video socket. Connect the other end of
the cable (at the end with the ferrite filter) to the
computer video socket.
Tighten all finger screws to prevent the plugs from
accidently falling out during use.
To Connect the HDMI Cable
Connect the plug of the HDMI cable to the HDMI
port on the monitor. Connect the other end of the
cable to the HDMI port of a digital output device.
Either
Or
Or
How to assemble your monitor hardware 13