I could see things not getting updated being a sd card issue, if the pattern of LEDs is the same on the dead board as the others then you don't have a blown chip, normally there drastically different or not at all, you said green/red LEDs so I am guessing the boards are green, check cables , swap two of them and see if the dead board moves or stays the same, if it moves then maybe a bad cable if the same then might be a messed up board, most trouble shooting steps at this point are very advanced, requires probing stuff and such. I don't know if I would buy a new board really the cost vs/ the payback is going to be a bit off .