ECHOGEAR TV Cord Hider for Wall Mounted TV – Dual Outlet in-Wall Cable Management Kit for Power & Low Voltage Cables – Includes 6.25”L x 8”H x 3.95”D Module, Wall Template, Saw, 6ft Extension Cord

If you have an outlet along the baseboard, you don't need an electrician. I used this and it's perfect. Basically just includes an extension cord that runs inside the wall to the outlet so you plug the TV's power cord in behind the TV, and the A/V cord(s) also run through it. https://a.co/d/067hbOVj If there's no existing outlet nearby, this won't help with the power cord. Edit to add: I have a credenza below the TV and the control box and audio equipment is in there, so it's all out of sight. As an aside, I love Echogear's products. Really well engineered for simple, easy installs. Clear instructions and good videos. I have three of their TV mounts and they are outstanding. I'm not a bot or a paid shill. I just really appreciate well designed, sturdy TV mounts.