Step 2: Reset The TV To Factory Settings. If checking the cables doesn’t solve the problem, try resetting your LG Smart TV to its factory settings. To do this, go to the settings menu and select the “General” tab. Then, select “Reset to Initial Settings” and follow the instructions on the screen.
Miracast issue - "Something went wrong your display couldn't connect". I am no sure why this is still a problem. It seems like quite a few users have this issue with Miracast. I have already updated my BIOS and re-installed Windows 10 Pro, with updates to all drivers using the Intel driver update utility.
Here’s how: Unplug your TV from the power outlet. Hold down the power button on your TV (not on the remote) for at least 60 seconds. Plug your TV back into the wall outlet. Now try the Xfinity Stream app again. You may want to keep these instructions handy; a good restart solves a lot of TV bugs. 3.
I had the same problem you describe with my LED 2018 model and had it fixed under warranty. The engineer replaced the Wi-Fi module and the problem hasn’t happened again for several months. The module is super easy to replace and it costs about $50-80. Alternatively the TV could be hardwired to router or node as a workaround.
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lg smart tv wifi problem