Media Center can certainly send images and video to a TV via Ethernet. But that is only part of the solution. Ethernet and WiFI are means for transporting bits from one device to another. However, the receiving device needs to know what those bits are and what to do it them. Ethernet just provides the bits, not the instructions as to what to do with them.
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https://www.lifewire.com/what-is-dlna-1847363
So for Ethernet to work, the TV would have to have an application designed for receiving image files and be able to display those images?
Sounds like a lot of trouble and something that TVs will not have?
But since Media Center and DLNA have some issues (others posted in this thread), then my solution might be to use two laptops.
Laptop #1 would be connected to the TV via either a USB or HDMI cable, and would be running Windows Pro, which has Remote Desktop server enabled.
Laptop #1 would also have Media Center installed.
Laptop #2 would be any Windows PC that would run Remote Desktop client (they all have the client app enabled), and could easily connect to laptop #1 via Ethernet.
The end result would be that laptop #1 (running Media Center) would have a basic, trouble-free connection to the TV, and laptop #1 would be controlled remotely by laptop #2.
Basically, laptop #2 would be a glorified remote control.
I just wonder if, since Remote Desktop sends the video to the client laptop, will the image still be displayed on the TV?
Assuming this works... it means an upgrade from Windows Home to Windows Pro, and that is somewhat expensive and my family members that are living elsewhere will probably not want to get into that. But it might be a viable solution to anyone reading this thread.
I had technical issues upgrading my laptop to the Pro version. Luckily, I purchased my license directly from Microsoft, so they were able to fix the problem. But I had to allow them to connect to my laptop. I cannot expect family members to go through that. Maybe there is other software that can do the remote job. TeamViewer? But the question of laptop #1 being controlled by laptop #2 while laptop #1 sends images to the TV remains a question.
By the way, the reason I am considering the two laptop solution is because it is what I had to do for playing music.
I use a USB cable to connect laptop #1 to my DAC. But USB cables must not be more than 3 meters (some say 5 meters). Either way, my seated listening position is a little over 5 meters from my DAC. So I have Remote Desktop send the video to my client laptop (the one on my lap), while sending the bit-perfect data stream (the digital audio stream) to my DAC.
And thanks for the link to the DLNA page.