Samsung SyncMaster 400DXn Owner's Manual page 31

To mount the product on the wall bracket
The shape of the product may vary depending on the model. (The assemblies of the plastic hanger and the
screw are the same)
Check the installation diagram and mark the drill
points on the wall. Use the 5.0 mm bit to drill
holes deeper than 35 mm. Fix each anchor in the
corresponding hole.
Match each of the brackets and hinge holes to
the corresponding anchor holes and insert and
tighten the 11 screws A.
Remove the 4 screws on the back of the
product.
Insert the screw B into the plastic hanger.