Dead Furbies tell no tales

I tried again to revive the (apparently dead) Furby that I am giving away on Listia. He is completely without power. I am thinking he might have a loose wire inside? A bad connection? He seems to be catatonic (Furbytonic?)

If he is dead, I don’t know what he died of. It’s not like I found him in the trunk of a car at the airport. There are no obvious signs of trauma. He doesn’t have any particular odor, or make any noise at all. I would operate on him, but he doesn’t seem to have any insurance.