I'm having trouble with my Yamaha RX-V485 receiver. After encountering a "version error", the USB, Bluetooth, and network functions have stopped working, making it impossible to perform a firmware update through normal methods.
After doing some research on forums, I found that earlier Yamaha models with similar issues (like the internal error message) could be fixed by shorting or soldering specific pads—such as R896—and then powering on the unit to enter a service/boot mode that displays the model info and allows recovery.
I managed to find the service...