Sony Trinitron Micro Latch-up

The error-code in the service manual of the Sony Trinitron TV used in the waiting area, model KVXJ29M50, indicated "Micro Latch-up". Apparently that means that some CMOS component is damaged?

https://eng.libretexts.org/Bookshelves/Electrical_Engineering/Electronics/Introduction_to_Physical_Electronics_(Wilson)/03%3A_FETs/3.12%3A_Electrostatic_Discharge_and_Latch-Up

Currently not digging further.

Edit 16 Aug - saw some waveforms of "board C6" on oscilloscope, they seemed to be OK - at least not flat, even for R, G and B, even though R is not coming on screen. Perhaps damage inside the picture tube? Or on the board C6? Anyway, not digging any further, just leaving it, as it works as a "monochrome" or "duo-chrome" monitor at present.