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Richard Schierer

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How to display videos/slides on 3 separate monitors through out our office but managed centrally?

We have 3 monitors that are currently used as displays through the building. 1 is over the reception desk, one is in the kitchen, and the other is near the time clock.

I currently use TV box devices to manage what’s on those screens, but is there any way for them to be managed centrally, connected to the network?

We would need to show either slides or videos, and they might need to show different things.

The monitors are presently connected to the TV box wirelessly.

Thanks!
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Ron Malmstead
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Will all 3 tv's have the same screens?
If so, you can use a splitter, to duplicate the HDMI output on your computer, then HDMI ethernet adapter to send the signal further.  HDMI cables have a length limit... which is why the adapter would be required.

If the screens will all have something different, then you would need multiple HDMI outputs on a central PC, and use the  HDMI ethernet adapter for each output.

What are the "TV box" devices you are using?

This sort of thing might do what you want:
https://www.amazon.com/Beelink-64-bit%EF%BC%884GB-X5-Z8350-Processor-Computer/dp/B084WRRV51/ref=asc_df_B084WRRV51/?tag=hyprod-20&linkCode=df0&hvadid=416769961145&hvpos=&hvnetw=g&hvrand=2600785674458273978&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9032911&hvtargid=pla-897303459559&psc=1&tag=&ref=&adgrpid=94693386955&hvpone=&hvptwo=&hvadid=416769961145&hvpos=&hvnetw=g&hvrand=2600785674458273978&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9032911&hvtargid=pla-897303459559
It is a very small computer, $139 US, that supports dual video outputs, WiFi and wired Ethernet, and runs Windows 10.  You could set it up to display whatever you want on the TV and use Remote Desktop (or some other remote control program) to control it.

There are more specific boxes that will do this sort of thing, but last time I checked they were significantly more expensive.
Your statement of "they might need to show different things " implies to me that a splitter won't work for you.  But, I do like Ron's suggestion of a single computer with 3 long HDMI cables (using extenders), though you'd want to be able to see the three monitors so you know what you are putting up on each.  That may require using Remote Desktop to that single computer.
@Richard, mention your exact "TV Box" + likely someone can help.
I was looking to do something similar and only recently found out you can have hdmi over wifi or via ethernet

https://www.amazon.com/wireless-hdmi/s?k=wireless+hdmi
https://www.amazon.com/Cable-Matters-HDMI-Extender-Ethernet/dp/B00OZV04BK

I ended up not having to go through with this, but from researching, it did seem there were issues using wifi for the less expensive devices. 
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Richard Schierer

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CompProbSolv
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