Just a warning of a little gotcha here.
I had a very strange situation yesterday where two different Raspberry Pis--not just different units, but different versions--suddenly refused to boot any of several OSes at all. They were connected to an Onkyo receiver via HDMI which was then passed through to a TV. I swapped MicroSD cards, power supplies and HDMI cables. I made sure nothing that didn't have to be connected was connected, but I consistently got nothing but the rainbow splash screen and the upper-right red square indicating overheating. It made no sense whatsoever, but I messed around with them for hours.
In desperation I finally took one of them into another room and connected it to a different system. Immediate success!
The fix turned out to be: Unplug the power from the Onkyo receiver for a few seconds, then plug it back in.
While I'd never seen this particular problem before, I've had other issues with Onkyo's HDMI implementation that have been fixed with the same power cycle method.
I had a very strange situation yesterday where two different Raspberry Pis--not just different units, but different versions--suddenly refused to boot any of several OSes at all. They were connected to an Onkyo receiver via HDMI which was then passed through to a TV. I swapped MicroSD cards, power supplies and HDMI cables. I made sure nothing that didn't have to be connected was connected, but I consistently got nothing but the rainbow splash screen and the upper-right red square indicating overheating. It made no sense whatsoever, but I messed around with them for hours.
In desperation I finally took one of them into another room and connected it to a different system. Immediate success!
The fix turned out to be: Unplug the power from the Onkyo receiver for a few seconds, then plug it back in.
While I'd never seen this particular problem before, I've had other issues with Onkyo's HDMI implementation that have been fixed with the same power cycle method.