Sony SRS-X99 Help Manual page 232

The connection is complete.
If the LINK indicator lights up in red
The speaker failed to connect to the Wi-Fi network. Try connecting again.
Hint
If the Wi-Fi connection fails even if you try several times, initialize the speaker and delete the setting information of
the Wi-Fi connection, then try connecting again.
Note
When you connect the speaker to a Wi-Fi network for the first time after purchase, or after you initialize the speaker,
the BLUETOOTH/Network standby function is turned on automatically.
Related Topic
Using the BLUETOOTH/Network standby function
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