Yamaha SHS-500 Reference Manual page 18

Troubleshooting
Q Cannot connect with Bluetooth.
A
Check that the Bluetooth function of the smart device is activated.
A
Check if another smart device is connected to the keyboard via Bluetooth. If this is
the case, disable the Bluetooth function of that smart device, then try connect to the
desired smart device again.
A
The keyboard cannot connect to the smart device via Bluetooth if the computer is
connected to the keyboard with a USB cable. When using Bluetooth connection,
make sure not to connect any other device with a USB cable.
A
Check that the smart device is compatible with the app "Chord Tracker" on the
Yamaha website:
https://www.yamaha.com/kbdapps/
Q USB cable connection doesn't work.
A
The USB cable connection will not work correctly if you switch from Bluetooth
connection to USB cable connection without closing the app. If this is the case, turn
the [P] (Standby/On) switch off and turn it on again. Then try the operation again.
Q Cannot transmit/receive the audio data to/from the external audio device.
A
Audio data is not available with Bluetooth connection. Use USB cable connection.
Q "!" is shown in the display.
A
The protection circuit has been activated due to over current. Disconnect the USB
device from the [TO HOST] terminal, then turn on the power of the instrument again.
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