There are two ways to hide cords hanging from mounted TVs: either wrap them in cable concealer, or put them through the wall. Although some DIYers are able to tackle the project themselves, there may be restrictions on what types of wires can be hidden behind drywall. You might be better to hire a professional.Installers typically cut small windows in the drywall to hide the TV's cords, then run them down the wall. Next, cut another window at the floor near the outlet where they plug into.