Ah! I looked up the receiver, and it doesn't have hdmi.
So, you need to connect the composite (yellow) monitor output on the receiver to a composite input on the TV, which might require connecting an accessory "dongle" to the TV that would have come with the manual and remote. Then you have...
My guess is, the TV is being used for switching, so there is no way to view the receiver's menus onscreen.
Your sources should go to the receiver first, then to the TV. Then you can access the receiver's setup menu when using the hdmi input on the TV.