And the insides look like they weren't meant to be repairable.
FWIW when my first egreat started acting up (freezes or shuts down) 3 years ago I opened, operated it and found one chip so hot it's barely touchable so I mounted a small heatsink (originally there was none), after that it worked fine. Hanggang ngayon it still does its job in my secondary set, though it doesn't get as much duty as the newer NMT in my main.