Why do I get into my Wi-Fi network with one TV and not with the other?

I have two Samsung TVs, one in the living room, and one in the bedroom. Now it is for a long time so that I can't access the Wi-Fi with the device, which is in the bedroom, suddenly. The device in the living room, which I have only 1 week, has no problems with the decor and I was immediately in the wireless (after entering my login data for the network) The device what I have in the bedroom, was previously synonymous logged in the same W-Lan network as the one I have new. For a week but I'm no longer with the older device (1 year old). Ergo: No more Netflix. What can be the reason?

Maybe one of your neighbors has now put a Wi-Fi router into operation (or a repeater) and "pushes your network away".

Did you change the SSID of your WLAN? Afterwards two devices use the same SSID and your TV tries to log in the wrong one.

I do not know, the Wi-Fi is about my parents. So my parents have the router and my brother and I, we all live in the same house, can use it. So we have only signal amplifier in the apartment (w-lan repeater) But as I said, before everything went and even my new TV I could edit without problems in the wireless network.

What can I change that is going to happen again? Because as I said, I could insert my new TV directly into the Wi-Fi.

First, find out what it is → with a smartphone and wireless scanner to search for new networks and display which networks may interfere.

If several repeaters and routers are distributed in the house and all use the same SSID (no mesh) → maybe the TV simply can't decide which network is the best connection and separates and connects and disconnects and connects and disconnects and…

Ok and if so, what can I do then?

The WLAN accordingly transform.