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AirPlay "Unable to connect to".. 43NANO79


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@Kai Hendry Make sure that the room where the TV is, has a good/strong WiFi signal.  Check what your smart phone is using (2.4GHz WiFi band, or the 5GHz band), and make sure that the TV is using the SAME BAND.  NOTE: do not confuse the WiFi 5GHz band with 5G phone capability, that just means "Fifth Generation"..... 😊

Also, check the WiFi strength "bars" icon, on the smart phone, in the same room as the TV to gauge its strength. If you have a laptop, it is much better to check the WiFi signal strength and quality with a nice utility from Nirsoft, called "WiFiInfoView". It is free, check here: 

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Just download that, unzip it into its own folder, and run the .EXE executable from that new folder (you can right click and creat a shortcut to it on the desktop wallpaper, for later use).

By the way, if you can log into your router, go to the Settings, WiFi (both bands), and go to advanced, check the channels in use, try 36 or 44 for the 5GHz, or 8 for the 2.4GHz, AND ensure that the SSID names for both are not longer than 8 characters, and do not have any special characters in them (like BigAls'WiFi!~ or similar), as some LG TV sets do not like that.

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@Kai Hendry Thanks for confirming that, I would NOT have known that fact until you posted it! What about "Check what your smart phone is using (2.4GHz WiFi band, or the 5GHz band), and make sure that the TV is using the SAME BAND."?? If the WiFi is strong, why did you choose to use a wired LAN cable, as that limits you to  100Mbps, and the 2.4GHz WiFi can be 150 - 300MBPS, with the 5GHz around  600 - 900Mbps or more  depending on your router model?  With the connectivity being intermittent, It might be worth disconnecting the TV LAN cable, and trying to see if connecting up the WiFi side stops the issue, BUT use the same band that the phone is using.

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@Kai Hendry Before you take that drastic decision (that might not fix the issue), please consider this technical post I spotted on an Apple forum below, as I beleive that is DOES cover your error scenario, as I think the issue IS on the Airplay side, not the receivng (TV) side. Just because you get a good basic "connection" between the iPhone and the TV, does NOT mean that a complex APP protocol will fully function. Please read the quote below:

"The symptoms you describe are as if the multicast airplay discovery packets are being blocked. Some routers don't route these between wifi and ethernet, even on the same router. Other routers handle this and it's not an issue. You should never need bluetooth to make the AirPlay connection. The "Use AirPlay to wirelessly stream content from your iPhone, iPad, or iPod touch - Apple Support" Apple help document doesn't even mention ethernet, only wifi. When the ATV is wired, AirPlay from iPad may work intermittently, as you describe. It appears to "work", which is surprising, but then it just fails totally. Using bluetooth as you describe may get you past initial discovery, but there are still internal packets that expect to go direct over the wifi. I hope you can resolve at least some of these problems by switching the Apple TV [or the TV in your case] to wifi [from the current wired Etehernet LAN]." 

By the way, you might STILL need to check your WiFi SSID name, and see if the 2.4GHZ and 5GHz have DIFFERENT SSID names for each, or if they are merged into 1 name.  You will be fine if the 5GHz signal is strong and has a good signal quality, but can "flap" (disconnect/reconnect) between the bands if the name is merged, and the quality drops. Some complex apps can be sensitive to this.

"So I was having this same issue described in this thread and I believe I resolved the issue by making a change to my wireless network.

My wireless access controller (enterprise cisco network however same applies even for home routers) was advertising one SSID for both 2.4 & 5.1 GHz wireless networks. There is a feature in most new wireless access points called band steering. If you only create one SSID for your wireless network and it rides both your 2.4GHz and 5GHz network than your device will switch bands [flap] based on many factors including interference / congestion / signal strength. This explains the randomness of the connectivity as a microwave, or passing car, cell phone, or neighbour [on the same channel] can generate wireless interference very easily. The issue resides with the sending device however, because the issue was still happening on Apple TV's [and your TV scenario] that were not configured for wireless and actually plugged in via ethernet.

So my solution was to create a separate 2.4GHz and 5GHz wireless network SSID (wireless2.4 & wireless5.1 for example) and then configure my laptops and other APPLE devices on the network to only connect to the 5GHz network, and not allow them to switch based on the algorithm it uses to determine what the best connection is."

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I think I found an issue with my Iphone DNS being set to Google DNS's 8.8.8.8. When I turned it to automatic, it appears to work more reliably.

 

Another element is to ensure Youtube is exited before trying to Airplay.

 

Nonetheless the whole "Smart TV" experience is a bit... underwhelming to say the least!

 

Thanks for your time.

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