An LCD flat screen TV is lightweight and can be wall-mounted without difficulty. To wall-mount an LCD flat screen that does not having mounting holes on its back, use a wall mount designed for a TV-tube based model that features a TV shelf. The LCD flat screen can sit on the shelf and so still be mounted to the wall. You can purchase a TV shelf wall mount from an electronics store, and you will need a few common household tools to complete the installation.
Measure the width of the flat screen TV, starting at the bottom left corner and ending at the bottom right corner, using a tape measure. Purchase a TV shelf wall mount that has a shelf whose dimensions are large enough to accommodate the LCD flat screen TV.
Place the TV shelf wall mount against the wall where you will be mounting the flat screen TV. Hold the TV shelf wall mount so the shelf is at the height where you want the flat screen TV to be located. Draw a dot on the wall through a hole in the top of the mounts' bracket, using a pencil.
Turn on the digital stud finder. Place the sensor on the stud finder against the wall, over the dot to your left. Move the stud finder toward the right while pressing it against the wall. Stop moving the stud finder when it beeps. Mark this spot on the wall with an "X," using the pencil.
Place the TV shelf wall mount on the wall with the hole in the top of the bracket lined up with the "X" mark on the wall. Drive a wood screw halfway through this hole and the other holes on the bracket, using a Phillips screwdriver.
Place a level on the top edge of the mount. Angle the mount so the bubble in the level is between the two lines on the panel on the level. Screw the wood screws the rest of the way into the wall, using the Phillips screwdriver.
Have an assistant help you lift the flat screen TV and place it on the mount's shelf. Push the TV back against the wall. Place the clamp of a security cable on the upper left corner of the TV. Repeat this step with another security cable at the upper right corner. Place the other ends of the security cables against the wall and screw a wood screw through the holes in the ends and into the wall just beneath the topmost left and right screws.
Place the other ends of the security cables against the wall, pulling them tight, and screw a wood screw through the holes in the ends and into the wall just beneath the topmost left and right screws.
An electric screwdriver works faster when you're mounting wood screws in a wall.