Solid Red + Green LED


Received my HA Yellow with CM4 + SSD
Connected to network + Plugged in - Constant Red + Green LED’s
Assumed device software is not on board as expected so connected to PC & reloaded via USB-C then reinstalled firmware using USB drive which progressed all the way to solid Red LED indicating success.

Ethernet cable plugged in - insert power cable (Non POE unit) - Solid RED + Green LED’s!?
Tested Ethernet cable - can access internet using cable with Wifi disabled.

Any Ideas?

Reinstalled using RPIBOOT
Flashed os
Still not working…
Connected putty serial debugger, black screen pops up but pressing enter does not progress to next step.

Any ideas?