Sony SRS-X77 Help Manual page 278

Help Guide
Troubleshooting
Personal Audio System
SRS-X77
The controller cannot find the speaker (The controller cannot browse the contents of the speaker)
Make sure the wireless router/access point is turned on.
When the speaker is connected to a Wi-Fi network, place the wireless router/access point and the speaker closer
together and perform the setup again.
Make sure that the controller and the speaker are connected to the SSID of your wireless router.
Disable the multicast control on the wireless router/access point. For details, refer to the operating instructions
supplied with your wireless router.
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