Only Ge fails I remember were dead short, open or intermittent
open, & noisy ( crackling in audio). Not like Si that work or dont.
Glad Ge transistors are long gone !
For overheating HOT measure the current. SAMS schematics almost
always give the specs, someone here will help with that. You can
have a problem that does not show in the picture especially on such
an aged set.
Ge's often use complex bias with diodes & thermistors. Can be quite
hard to find problems when something is only "a little off".
Good luck
Zeno
LFOD !