LG Flatron L173ST User Manual page 6

Before Connecting to the PC
Before setting up the monitor, ensure that the power to the monitor, the computer
system, and other attached devices is turned off.
Unfolding the stand base
Place the monitor with its front facing downward on a cushion or soft cloth.
Hold down the release button inside the stand and strongly pull out the stand with
your two hands.
The stand won't move if you don't
press release button.
A5