Is the wireless connection on your main router working properly? Can you see the TL-WR940N on your main router? After you finish settings, try to restart your main router and repeater.

Where did you download the new firmware? Make sure you do download the proper FW as your HW version.

Which firmware are you try to update? You can go to tp-link official website and the proper firmware for MR200 EU V1 are all shown there....

Have you tried other ethernet ports on the router? When you connect TV to the router via a cable, is the LED light on? Can you obtain ip address on the TV? You can try to change cable or port. This...

Yes, we can set the same SSID as your router/hub SSID. There are two ways: One is through button: https://www.tp-link.com/us/faq-1097.html The other is through Utility or APP....

Generally speaking, there is no any special settings we need to do on PLC for Xbox. Do you mean Xbox can work through your main router but not TL-PA8010P? How about if you connect a laptop/pc to...