Strange issue out of pretty much nowhere. I’ve been using CoreELEC on my Minix Neo for quite some time now. For whatever reason, the Wired Ethernet no longer functions. I’ve had to enable WiFi in order to use the device in the interim. I swear I was using it one night (it’s hooked up to the bedroom TV), fell asleep, tried to use it the next night and noticed nothing was connecting. I went into the CoreELEC add-on within Kodi and scrolled down to the connections and there was nothing listed. The device is plugged into a hardware switch and that ethernet plug is indeed light up. I unplugged the Ethernet cable from the device and the corresponding port on the switch went dark.
So, not entirely sure what the steps would be to troubleshoot the issue?