LG shows no signal
shows no signal even after following instructions other tv's are connected to wifi
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Your LG TV displaying "No Signal" typically means the issue is with the current input source (like HDMI from a cable box, gaming console, streaming device, or antenna), not the TV's Wi-Fi connection. Since you mentioned other TVs are connected to Wi-Fi (and presumably working for streaming), and you've already tried some instructions, this points to a problem with the external signal/input rather than internet/apps.
Try a soft reset on the TV: Go to Settings > General > Reset to Initial Settings (this won't delete apps if signed in, but back up if needed).
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What is the make and model number of the TV? Does the TV screen turn on at all?
by teardown-er