I blew up my receiver. Now what?

You could spend $10k on a AVR and find ten $500 integrateds that will absolutely kill it in sound quality

OK, I’ll bite. I want to be able to

• switch between various HDMI video sources
• stream audio & video from AirPlay, Spotify Connect, and ChromeCast
• listen to FM radio
• drive a pair of 4Ω Totem Rainmakers

How do I do that for $500 with better sound than an expensive AVR?

Good for you, JMK. Some of these jerks need to be bitten back.

All electronic components run on smoke. If you let the smoke out, they don't work anymore...
That being said, I'd open it up to see what fried. The power transformer should have been protected by the fuse. Often, there is a power line conditioning circuit/components prior to the fuse. If not rated for the higher voltage, that's what smoked. Relatively inexpensive repair.
Look before tossing.

I hate it when that happens. I know an audio technician in St. Louis who is apparently able to fix almost anything. I visit him often, because sometimes things break, especially if you have ten systems. I hesitate to give his name, because if he is too busy, I would have less access. He even fixed a broken Oppo 83 that I got for free from a colleague.

Next time make sure you check the voltage requirements before plugging it in.  If you would have noticed it was set for 120 or 110 you could have returned it or purchased a voltage converter to use with it.