BenQ XL Series User Manual page 17

Turn on the monitor by pressing the power button
on the monitor.
Turn on the computer too, and follow the
instructions in Getting the most from your BenQ
monitor on page 25
software.
To extend the service life of the product, we recommend
that you use your computer's power management function.
When the monitor is powered on, to prevent overheating,
do not cover the monitor with the supplied protective cover
or obstruct the ventilation holes.
to install the monitor
How to assemble your monitor hardware 17