Thanks for anyone reading this first of all.
Just installing Openwrt on my ubiquiti edgerouter X SFP.
There one extra step to install per the device page (https://openwrt.org/toh/ubiquiti/ubiquiti_edgerouter_x_er-x_ka), and that is to install a specially created .tar file first and then upgrade to normal openwrt.
I did everything by the book, but after the file was uploaded I got a ubiquiti "router disconnected" message, and since then I got nothing.
No ubiquiti OS response, No Openwrt response.
What should I do now?
*made sure to wait a few minutes after uploading the firmware
*made sure to switch the cable from eth0 to eth 1
Really Really appreciate any help, first time with a failed install not sure how to proceed.