The PSU is the one delivered with the RUTX. I’ve measured the output on the PSU which shows 12.2V/1.5A, so that seams fine.
The pwr LED is flashing, sorry if I was unclear. When rebooted the pwr LED has a steady light for 1 minute or so but then starts flashing. The green LAN lights with LAN connected are also flashing as per normal traffic.
The UI can not be accessed, nor via a WiFi AP or directly connected to LAN via cable. The computer only shows “unknown network” and server/router can not be reached.