Yamaha TSX-N237 Owner's Manual page 49

Problem
Unable to play Internet radio.
Firmware update failed.
The unit is unable to connect to the Internet via a
wireless LAN router (access point).
The MusicCast CONTROLLER app does not
detect a wireless network.
My iPhone does not recognize the unit when
using AirPlay.
Cause
The selected Internet radio station is currently offline.
The selected Internet radio station is currently broadcasting
silence.
Access to the network is restricted by network device (wireless
LAN router, etc.) firewall settings.
The network connection is unstable.
The wireless LAN router is turned off.
The unit and the wireless LAN router are too far apart.
There is an obstacle between the unit and the wireless LAN router.
The unit's wireless LAN function is disabled.
A device that operates in the 2.4 GHz band (microwave oven,
wireless network device, etc.) is interfering with wireless
communication.
Access to the network is restricted by the wireless LAN router's
(access point's) firewall settings.
A wireless LAN router that supports multiple SSIDs is used.
49
Solution
The radio station may be experiencing problems with their
network, may not be broadcasting, or their services may have
been terminated. Try to play the station later or select another
station.
Some Internet radio stations broadcast silence at certain times of
the day. When this occurs, there are no problems with reception,
but no sound plays. Try the station later or select another station.
Check device firewall settings. Internet radio can be played only
through the port specified by each radio station. The port number
varies depending on the radio station.
Try again later.
Turn on the wireless LAN router.
Place the unit and the wireless LAN router closer to each other.
Move the unit and the wireless LAN router to a location with a
direct line of sight (no obstacles) between the two.
Enable the unit's wireless LAN function (#####).
Turn off the offending device, or move it farther away from the
unit and the wireless LAN router.
Confirm wireless LAN router firewall settings.
The router's network splitter may be blocking access to the unit.
When connecting a mobile device, use an SSID that is able to
access to the unit. Try connecting to the primary SSID.
Troubleshooting