Need Schematic - Fried SmartThings V3 Hub

I’ve damaged my Smart Things V3 by connecting at 12V DC supply. There is no indication of voltage on the hub being the issue and having mislaid the OEM power supply.

Having already removed a blown Zener diode I have established that the problem is something else.

Does anyone have a schematic they can share so I can repair this as I’d rather not bin it. Or alternatively does anyone know what components are damaged by connecting more than the 5V needed.