Issue with KDL-48W600B possible LCD issue.
I have a Sony KDL-48W600B and after several different Google searches for my particular issue, I have not found anyone with a similar problem.
The TV powers up and works fine for 1 - 2 minutes, then after that time, there is a screeching noise from the back and the LCD turns on and off randomly. Sound and the rest of the TV continues to work and it seems like it is just the LCD that is being powered on and off. I have replaced the LDHM2 board thinking there was a capacitor issue on that board but it did not resolve my issue.
Below is an image of the board, the circled components are where the noise is coming from.
Below is a short video of the sound that the board is making.
I am wondering if anyone has experienced a component board that made a noise like this or if anyone has any idea what those components are? (I’m not that experienced in working with electronic components.) Or why it would cause the screen to turn on and off like this. I know it is limited to the LCD and not the main board power because the TV continues from where it was and there is no boot up of the TV as this is occurring.
Anyone have any ideas, I have little experience with this and am not sure if there is another component between that could be causing this issue. If so is this something that can be replaced.
Followup image of the CN9101 pin out voltages. Not sure how the actual pins relate to the service manual’s pin diagram so the diagram on the PCB side is the row of pins closets to the PCB Board.
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