The RX-V373 lacks built-in Wi-Fi or Ethernet ports, meaning it cannot execute an over-the-air Network Update . Firmware and Software - Yamaha - United States
If you encounter persistent issues like no sound or "Decoder Off" errors after an update, a factory reset may be necessary [14, 18]. Factory Reset: ADVANCED SETUP menu, navigate to button to change "Cancel" to " ," then press to shut down and reset the unit [3, 18]. Hardware Check: yamaha rx-v373 firmware
If the receiver doesn’t respond to power button: The RX-V373 lacks built-in Wi-Fi or Ethernet ports,
If it works, great. If not, reset it. If still not, recycle it. Hardware Check: If the receiver doesn’t respond to
Before attempting any system changes, check the firmware version currently flashed onto the internal EEPROM microchip. The receiver must be completely powered down to access the hidden configuration interface.