Certain types of heavy flat-panel televisions require additional reinforcement. Adding this extra support is easier than it might first appear. All that is needed is a sheet of reinforcing material, alongside the traditional tools required for mounting a flat-panel bracket.
Find two studs on the wall for mounting the bracket and reinforcing panel, using the stud finder. Mark the stud locations with the tip of the drill bit.
Lay the wall bracket portion of the flat-panel mount against the MDF sheet. Measure and cut the MDF sheet 3 inches larger than the mount using the circular saw.
Hold the MDF sheet against the wall. Drill a hole through each corner of the MDF sheet 1 inch from each boundary, and into the studs. Drill an additional bolt hole between the corner holes on the sides of the panel.
Insert the lag bolts and washers included with the wall bracket through the drilled holes.
Hold the wall bracket against the mounted MDF sheet. Drill six additional bolt locations through the pre-cut bolt holes into the sheet.
Drive the six supplied lag screws and washers through the wall bracket and into the MDF sheet.
Do not rely on molly bolts or anchors driven solely into drywall or plaster. Even if the bolt is sufficiently rated to hold the weight of a flat panel, it is unlikely the wall material can hold the weight.