Sony FDM-330 Color Watchman restored :)
 

My Sony FDM-330 Color Watchman is finally restored.
Found a replacement LCD which did not have a polarising filter that had turned yellow and and inverter that works great.
You can the 2 x LCD displays and the left one has the yellow filter.
So like with other Sony LCD TV's from around 1988 I presume the UV turns the filter yellow. The LCD also develops a large dead spot in the middle and lines.
Other issues include back LCD flouro back light and inverter board.