Remember: When in doubt, consult the manual. And when the manual points to a fault you cannot fix, do not hesitate to contact a Yamaha authorized service center. Sometimes, professional help is the smartest tool in the box.
These are split into multiple sheets:
7 inputs and 1 output, supporting HDMI 2.1 features like 4K/120Hz and 8K/60Hz. yamaha rx-a2a service manual