I think that such list will never exist, at least without Panasonic restricted doc leakage.
There are several A-board P/N and firmware version could play a rule in the game.
The PCB "via" is VERY small, details in published photo are magnified by a big factor, stay away from it if you do not have a real good soldering skill.
The first time i tried the I2C programmer on service connector i did not touched that PCB trace at all, and after a successfully EEPROM reading at address 0x50, i discovered with BIG surprise that also write function is working without any problem.
Even so, out of curiosity, i soldered a small PTFE wire wrap wire on that PCB "via" and i checked its logic level with and without placing service connector PIN 10 to GND.
With PIN 10 tied to GND, turning on the TV set two things happen :
- the TV panel does not turn on, no sound is produced, green light present
- the EEPROM write enable line goes active (logical low state)
If you are able to build the programming cable, using the following lines :
-8 PANEL_SCL (PANEL EEPROM)
-9 PANEL_SDA (PANEL EEPROM)
in conjunction with an I2C EEPROM reader / writer, sure the job worth a try.
I found the needed 2 mm pitch female connector inside an electronic scrap box.
All lines are working with 3.3V voltage standard and all are internally "pull-upped" (GND excluded, of course ...), so I2C programmer can access the interface with "open collector" / "open drain" configuration (so i did).
Just out of curiosity, how ended the lawsuit (about this matter) against Panasonic in US ?