Chromecast suddenly stopped working. Doesn't turn on, no solid lights.

My OG Chromecast suddenly died. It doesn't do anything when plugging in USB power or HDMI. It was working fine a few weeks ago but then just suddenly stopped turning on. Every now and then I saw a few faint light flashes on the LED, but it stopped doing that now after I opened it up. I've tried multiple micro USB cables and external power supplies to no avail. Is there anything that I can do to repair it?

I don't want to replace it with more modern version because this one doesn't resample audio when I use it to stream audio via my AVR. I already have a 4K Chromecast plugged directly into the TV but it resamples all audio so is no good as an audio only streamer.