Flash of white light after plugging USB-C to motherboard

Hi all,

I plugged a new USB-C device (a dac/amp, moondrop dawn pro) to my motherboard's USB-C port, and I saw a flash of bright white light from inside my PC (I think from the top left, near the motherboard's I/O shroud; not 100% sure as I was looking from the back of the PC). PC was on, it seemed to still work fine for a few minutes after, then I shut it down and unplugged it (which I prob should've done ASAP).

What should I do next? Do I need to replace/RMA the motherboard and/or anything else? Are my PSU, CPU, RAM, SSD etc safe? I haven't dared to turn it on again since

It's a brand new PC (I built it <2 months ago) with everything new except GPU... Specs: https://imgur.com/a/jwoGlxY (motherboard is Gigabyte X870E Aorus Elite WiFi7)

Pic(s) of motherboard: https://imgur.com/a/ejs3j22 - unfortunately can't really see much since it's all covered by shrouds (especially around I/O)