Matt Max
S/W problem, as in, it actually may be A BOOTLOOP?

Software update..

S/W , software problem -Understood .
    I've not read a scenario the same as yours so I could not speculate if events led to software malfunction . It might be the case .
  I've certainly read of service guys wanting to change motherboard as a chargeable fix when users said it was software issue .
  Although official line should be  
take to service guys and cough up $100 ,if I had taken the brave initial step of removing back cover I would try edl test point .
I really have no idea if circuit board was damaged and therefore edl is a waste of time . Sorry .