In this video we walk through upgrading a the firmware using the front buttons on a Yamaha receiver.

Below you will find some receivers that you can purchase from Amazon.com:
Yamaha RXV681BL 7.2Channel MusicCast AV Receiver with Bluetooth @ Amazon.com: http://amzn.to/2Gl5fVB
Yamaha AVENTAGE Audio & Video Component Receiver,Black (RXA670BL) @ Amazon.com: http://amzn.to/2DF53ma
Yamaha AVENTAGE Audio & Video Component Receiver,Black (RXA770BL) @ Amazon.com: http://amzn.to/2DDgVFc
Yamaha AVENTAGE Audio & Video Component Receiver,Black (RXA870BL) @ Amazon.com: http://amzn.to/2DO2626