Just make sure you use in wall rated cords (or add a new power outlet with romex cable) for anything with high voltage. There are in-wall kits like this: https://www.amazon.com/dp/B00GWGZKF6
Running power cords or extension cords in a wall in the US is against the national electrical code and might break your home owners/renters insurance if you had a problem like a short circuit or a fire directly or indirectly caused.
Edit: removed amazon referral link
One cable-related comment here: I don't think running your computer's power cord through your wall in that way is up to code in most states. I looked into this when I was wall mounting my TV and ended up buying one of these things to make it work. Most people don't care about this, but you seem like the kind of person who might.
Looks to be mounted on drywall, or similar, wall. Most likely has all his cords ran behind the wall with a kit similar to this:
https://www.amazon.com/dp/B00GWGZKF6/ref=cm_sw_r_cp_awdb_t1_.c7JBbBVYZ19T
*Note: Anyone who may read this, please dont just cut a hole in the wall behind your tv and lower again behind your console. They make kits like this for a reason and you shouldn't be just running live power cords behind the wall, ESPECIALLY an extension cord.
I even got the appropriate certified HDMI cables because the last thing I want is a code violation when I go to re-sell my house. Also these things are great if you dont want to hire an electrician to move outlets or install a new one
https://www.amazon.com/PowerBridge-Recessed-Management-PowerConnect-Wall-Mounted/dp/B00GWGZKF6
If you want to relocate the outlet easily you can use one of these, they work really well for cables and power:
PowerBridge ONE-CK Recessed In-Wall Cable Management System with PowerConnect for Wall-Mounted Flat Screen LED, LCD, and Plasma TV’s https://www.amazon.com/dp/B00GWGZKF6/ref=cm_sw_r_cp_api_glc_fabc_jQP2FbHB8T095
something along these lines. Just as an example.
You can get something like this(for the uk) to make your wiring compliant. In the us at least, only the power cables are problematic inside the wall.
You could hide those cables under the TV with something like this
You can't run the power cable behind the wall, but you could run other things like OneConnect, HDMI, etc. behind the wall without much issue. If you don't want to add an outlet to the wall, this kit is your best bet (PowerBridge). I bought two of them and installed them in my apartment because obviously I couldn't add my own outlet. The install only took like 20 minutes.
I considered getting something like this to hook up my wall mounted TV to power, granted this has to be done to drywall. Not terribly complicated, but if you decide to move the setup you're going to have two holes to patch.
I personally would just install a new device box on the stud, run romex up to it and install a new outlet, but I did find this, which I found very interesting. other than the price... I'm not sure what wiring they used between the male and female power inputs, but the issue that arises is friction. Especially if the TV mount telescopes, wires don't like un-needed friction, or un-needed kinks as these lead to breakage either of the outer casing or the internal wiring itself. Just not safe but I'm glad someone else "backed me up" to show there truly is a valid reasoning not to do it. Also, with Romex being a solid core wire, I believe it must be "protected"/permanent. So a romex type extension cord wouldn't quite do the job. Running another outlet is the safest, code compliant method, but even then you must make sure you're not only running it safely, but not overloading a breaker as well. 12AWG Romex must be used at minimum, 14 is acceptable in homes, but only for light switches FYI, the rest must be at minimum 12AWG. (in the US, once again...)
We're off topic here, but this is what you should use: PowerBridge. It's against code to run a power cord in the wall (but okay to run HDMI and other low voltage AV type wires). This tidies everything up nice and neat, plus your insurance won't deny your claim should your house ever burn down. :D
You've got to account for whether you can get your TV plugged into a surge protector if the outlet is directly behind the TV. Most people are better off with a PowerBridge-type product, because it allows you to run the outlet through a surge protector still.
While not 'super' easy, this looks nice at least.
This is what I use when I don't feel like calling an electrician.
Definitely hurts the look not having the video and power cables for the monitor hidden. Pretty easy to do if you're handy with drywall. However don't just throw an extension cord behind the wall. Get something like a PowerBridge and run romex through the wall.
I fed the power and data cables behind the wall, which you shouldn't do. I didn't know any better back then. Buy a PowerBridge or something to stay up to code. Also, the desk had a structural shroud that you could hide the cables in as well.
For the TV, used a PowerBridge to feed the power up to the TV and stay up to code. The other components are connected to an energy-saving surge protector. They're powered whenever the receiver is on. They receive none otherwise.
you took the time to mount that tv, now finish it off by running the wires through the wall. PowerBridge ONE-CK Recessed... https://www.amazon.com/dp/B00GWGZKF6?ref=ppx_pop_mob_ap_share
Okay that’s kickass. Did some googling, and I have to say, that’s fucking amazing.
I got two of these, very easy and works perfect: https://www.amazon.com/gp/product/B00GWGZKF6/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
You could buy a Powerbridge to get the outlet behind the TV plus you'll be able to run HDMI cables through it too
This is basically the same thing, right?
https://www.amazon.com/gp/product/B00GWGZKF6/ref=oh_aui_search_detailpage?ie=UTF8&psc=1&th=1
Against fire code, needs to be romex inside walls. Very easy if you have an outlet directly below and a hollow wall.
Some places, you can get away with this.
We used this, no need for an électricien and takes 10min to install. https://www.amazon.ca/dp/B00GWGZKF6/ref=cm_sw_r_awdo_3S2CDQB0X0PJ4V3158TW
I found this, which is up-to-code for my city/state.
https://www.amazon.com/PowerBridge-Recessed-Management-PowerConnect-Wall-Mounted/dp/B00GWGZKF6
I already had HDMI through the wall on the other side so I can just put this in its place.
I used this to run power myself to where I needed it without need an electrician: PowerBridge ONE-CK https://www.amazon.com/dp/B00GWGZKF6/ref=cm_sw_r_cp_api_glt_fabc_3VTXRAJMJXQ4TW8JNAT7?psc=1
Looks awesome. If you really want it clean, take a look at this solution I used for my tvs. Really simple to set up.
You could do something like this in-wall power system and get a wall mount light with a large enough base to cover it.
It will be something like this:
https://www.amazon.com/dp/B00GWGZKF6/ref=cm_sw_r_cp_apa_i_DcALFbZYSW62X?_encoding=UTF8&psc=1
I used this to hide my power cords: https://www.amazon.com/PowerBridge-Recessed-Management-PowerConnect-Wall-Mounted/dp/B00GWGZKF6#
Is something like this not acceptable? I've seen it recommended a bunch and it has a ton of reviews...
https://www.amazon.com/PowerBridge-Recessed-Management-PowerConnect-Wall-Mounted/dp/B00GWGZKF6
One tip for hanging tvs that I always like is hiding the cords behind the wall. This is a link that shows that product. https://www.amazon.com/PowerBridge-Recessed-Management-PowerConnect-Wall-Mounted/dp/B00GWGZKF6
As for a storage device, maybe use like a cube organizer or a traditional media shelving unit to hold that stuff. Something with doors is always nice to hide clutter from games. You could potentially hang that too if you want. Don't know how it would fit in with the room, just depends on the rest of the house.
For those who are handy and with products like these, it could be simple and without an electrician:
https://www.amazon.com/PowerBridge-Recessed-Management-PowerConnect-Wall-Mounted/dp/B00GWGZKF6
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You could go with an outlet box:
Or a power bridge:
https://www.amazon.com/PowerBridge-Recessed-Management-PowerConnect-Wall-Mounted/dp/B00GWGZKF6
All will do what you want, safely.
Easiest thing to do is install something like this.
They sell solutions for this that (I assume) are up to code.
Take a look at THIS.
What about These
I suggest running the wires in the wall for a clean look. Just make sure your cables are rated for in-wall wiring. For power, have an electrician place an outlet behind he TV or look at a PowerBridge. If for some reason you cannot run your wires in the wall, they also make paintable plastic covers for wires.