Https://www.youtube.com/watch?v=MQj2t4nNVYc
How to perform a power reset on a Sony television. ... Turn on the TV, then make sure that the indicator does not blink (which means the TV has no issues). Connect the disconnected devices one by one to the TV. If the indicator starts blinking after a certain device is connected, check the device for a issue.
https://www.sony.com.sg/electronics/support/articles/00153674
SOURCE: sony bravia kdl-52w3000, turn tv on, no picture or
Most likely this is caused by a defective main board. Changing the main board will fix the issue about 95% of the time.
To be absolutely sure, the voltages need to be checked on the power supply. If they are not the values listed in the service manual, then you should replace the power supply instead (accounts for the other 5% of the time).
SOURCE: Bravia KDL-46VL130 TV: Our Sony KDL-46VL130 picture is streaking and some...
That symptom may cause by the main board or t-con board, I suggest you do software up grade first.
SOURCE: sony bravia kdl 46s4100 no picture
it sounds like your back light might be going out. You might be able to fix this by installing a new backlight inverter board.
SOURCE: Sony KDL-42V4100 has sound but no video. Input
Hi there
this is not meant as a solution, but a tip if you`d like to get an answer.
You should clarify in which occasion you get either sound and no video or black screen with sound.
This is a little confusing for a repairman.
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