Chosen Solution

Sony bravia logo comes on green light sound no red blinks but dark/black screen still have flashlovht image is it a cfl? Inverter board? Have 13volts on 12 volt + pins on inv.board

@ms9969 is it possible that this is a KDL-42BX420 ? We’d have to see some pictures of what this all looks like. If it uses CCFL for backlight than the voltage is definitely not okay. Again, post some pictures of all of your boards and how they interconnect. Also include the connectors on the panel. It very much sounds like a backlight issue but we need to determine if it is a CCFL or LED backlight. Adding images to an existing question