What should the green status light be doing when trying to boot? On mine, it flashes and flickers as if there's activity for maybe 30 or so seconds, maybe a bit longer then it stops.
I've flashed twice on a kingston 16gb SD using etcher, both coming up successfully.
I've edited the supplicant file for my WiFi, but can't connect, I get a timed out when trying to access octopi.local. I've also tried direct ethernet, same result.
Unfortunately, I've no mini hdmi so I can't connect a display so I can't see what's going on.
Flashed 17 - most recent.
Windows 10 machine
Ender 5 Pro printer