Re: Sony KDL-40s4100 No Picture/Sound/Backlight

I have the same problem with my Sony KDL- 40s4100. There is no picture, sound, or backlight. So I have decided to try your solution to your problem by disconnecting CN2502 on the A board. When i unplugged it the backlight came on,I was glad. Then I plugged the connector back on and power cycled the tv. Sadly the tv didnt power up with picture and sound like yours. So does this mean that the A board is damaged?