High-definition multimedia interface, or HDMI, cords differ from the cords that have traditionally been used to connect TVs to DVRs, cable boxes, receivers and other audio and video equipment. Other types of cords, such as standard RCA audio/video cables connect to the audio and video outputs on equipment separately, with individual cords for sound and video. With an HDMI cord, however, you only need one cord to transmit all of the audio and video information from any device to a plasma TV.
Purchase a television wall mount that can support your plasma TV. TV wall mounts list the maximum size and the weight capacity that they can hold.
Sit down on the furniture where you will most often sit to watch the plasma TV, such as a sofa. Choose a spot on the wall that is central to all viewing spots in the room that is roughly eye-level with the furniture. Mark this central spot on the wall with chalk.
Find the nearest wall studs to the spot where you want to hang the plasma TV with a stud finder. Mark the location of the studs with chalk.
Measure the distance between the pre-made screw holes on the wall mount. Measure the same distance on the wall. Make sure that you line the screw holes up so that each one falls directly on a wall stud. If you cannot line the screw holes up on two studs, line the screws on one side of the mount up on a stud and get anchors for the screws on the other side of the mount.
Attach the back plate of the wall mount to the wall with the provided screws. If you must use anchors, create holes slightly smaller than the diameter of the screws for each screw hole on the wall mount using a drill bit, and insert an anchor into each hole. Then, attach the mount to the wall by screwing the provided screws into the wall anchors.
Make a hole in the wall between the brackets in the wall mount. Use a drill bit large enough to create a hole that the HDMI cord can fit through. Make a second hole the same size in the wall below the first hole at the level where the DVR, cable box or other device that you want to plug into the TV will be located.
Drop one end of the HDMI cable into the hole in the wall behind the TV mount, while holding onto the other end of the cable. Secure the end of the cable that is still outside of the wall to the wall with tape so that you don't lose it.
Attach the front part of the wall mount to the back of the plasma TV you want to hang by screwing it to the pre-drilled holes in the plasma TV using the screws provided with the mount. Hold the plasma TV up to the wall and plug the HDMI cable into the HDMI port on the unit, and then slide the front part of the wall mount onto the back bracket and secure it with the provided screws.
Bend a wire hanger's hook so it is thin enough to fit through the hole you made in the wall. Hook the HDMI cord that is hanging down inside the wall and pull the cable out of the wall. Attach the cable to the DVR or other device you want to connect to the plasma TV.