WiFi channel overlap can indeed cause issues, a neighbouring property's network set up could be using the same channel as your router/access points. Even if your router/access point claims to have automatic channel selection to prevent this happening I would not, in my experience, trust it. Get a smart phone app such as this one to see what may be causing problems:
Yes, if you can run a cable to test it is the best way to see if the issue is or isn't WiFi related.
HBO GO was removed about 2015 and never came back. Since LG now has the Showtime app, maybe HBO GO will be next. Or maybe not.
I didn't wait -- got a Roku 4K box. Very annoying since my other TV (Sony Android) has every application under the sun.
After my LGOLED55C7 updated to 04.70.85 I have l;ost all sound through ARC.
I have an Arcam AVR550 receiver which works for everything else and used to work perfectly (even with the latest Arcam update that provided Dolby Digital +).
Unfortunately after the TV updated to 04.70.85 I have lost all sound over ARC. The reciever switches to RC as normal when, for example, Netflix is started, It shows Dolby Digital + is being transmitted, but there is NO SOUND.
I have factory reset both the TV and the receiver :-(
At the Kodi's pop up menu, there is a "play using ..." option. Your TV should be on the list after you select that option. Some addons may not be able to stream the content, but your tv will be on the list anyway. If not, there is something wrong with your router.