Yamaha HTR-6065 Receiver ‘Internal Error’, ‘Error 4000’, No Model Info Full Repair

Two complete solutions on how to fix the “Internal Error”/ or “Error 4000” and “No Model” Info error messages on various Yamaha Receivers. This works with at least the following Yamaha home theatre receiver models: RX-V673 RX-A773 RX-A720 RX-A820 HTR-6065 HTR-7065 (probably) HTR-6067 Always work with power DISCONNECTED. Do this accepting the risk and understanding you will certainly void your warranty – but the assumption is that your model is well past warranty anyway, so what have you got to lose? Life without risk is dull and pointless. My HTR-6065 is from 2012, so a decade out of warranty. Tools needed: Empty USB drive – if firmware update method works Philips head screw driver Magnifying glasses or bloody good eyesight Fine-tip soldering iron Solder and jumper lead (easier than bridging the pads with solder – which then has to be removed)