Little help resetting a 3rd Generation Apple TV?

Hadn't used this in quite some time, hooked it up (directly via HDMI) to TV, followed prompts to input WiFi/password info, then screen went black. Assuming it must've immediately started upgrading software/firmware, I left it sitting for a couple hours. After still just getting a blinking light and it not responding to the remote, I unplugged power, let it sit for a minute and started it back up. Nothing. Tried a different HDMI cable, a couple more rounds of on/off and still nothing. I fear that I bricked it by interrupting the software update and am hoping there's a solution. I connected it to my MBP (running Catalina) via USB and iTunes isn't recognizing it, so can't do anything there at present. Any ideas?