What should I do if my wireless network connection is not working properly?
Check if microwave ovens, DECT phones, or other Wi-Fi devices nearby are causing interference. Make sure firewalls in your network allow the TV's wireless connection. If wireless still doesn't work, try using a wired network connection instead. Also verify that your Wi-Fi router is properly connected to the Internet.
From the official Sony Wireless Headphones manual, page 27
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