R510 AP Disconnected and Unable to Reconnect

[shirtbrother]

I have x2 R510 APs and one works fine, the other does not. The PWR light has been red for some time now and initially, it still showed up in my Unleashed network manager as disconnected/offline, now it doesn't show up in Unleashed at all. The POE ethernet port is green and the PWR light has remained red.

I have done extensive research into self-service troubleshooting and have tried the following: Unplugging POE and replugging it, tried alternative POE ethernet cables, tested alternative ports on the main switch, and performed a physical factory reset. Based on similar support posts, it seems that my unit is likely defective. I am not sure what steps I can take from here.