....And why doesn't it see the receiver since it's first inline?
The Yamaha passes through the monitor connection to the
Mini and that is why you get the monitor and not the receiver
as the device. The Yamaha receiver is basically just performing
the function of an HDMI switch and just taps the HDMI audio
I have a 2010 Mini->Yamaha RX-v467->Samsung 42" LED.
Had a 32" Samsung before with the same results.
If it in fact saying it is an LG instead of Samsung, then there is
another issue. Suggest the following:
1. Shut all down.
2. Power up TV and wait for the on screen display of searching
for signal (or no signal).
3. Power up the Yamaha Rx. Wait a few seconds.
4. Boot the Mini performing a PRAM reset.
This process will force the Mini to reload all device based
parameters. The sequence of this is very important.