[Alex KL-1]

Yes, seems to be difficult; too many wires and so on. The solution is to follow each flyback wire, and see what ones ends at diodes, to measure them.
Not seem to have any diode in the HO transistor socket.
I sse some relatively fat diode near the socket with "24" number on it. Is impossible to know if is relative to flyback, without following the flyback wires.
Sometimes, in the hurry, I simply measure every diode near flyback at time I'm worked with TV's (is faster anyway).
The suspects are removed and measured externally to be sure.
I see one small diode in parallel with a small capacitor in one photo. These one seems to be improbable, but anyway, is good to check on the DMM diode scale.

Other thing, since manufacturers not want to use 2 times same funcion component, is good to measure on diode scale the HO transistor you removed from TV. Measure from collector to emmiter. In one side, basicaaly with negative (black) proble connected to collector (case), and negative to emmiter, the DMM will measure something between 0.5 and 0.8, and, for another side (reverse, with red onde connected to case), will measure OL. If measures this manner, the damper diode is internal/integrated to transistor case.