Sony Trinitron KV-D3411D displays no image

[polinko90]

Hi everyone, thank you for all the suggestions. I will look into it.

Meanwhile, I have a question to ask: I just hooked up my PS2 to an AV -> RF adapter and plugged it into the Trinitron, in the RF-in port. Once again, I only got sound. The RF port is in a different PCB, not in the one that was repaired, yet there was still no video.

1. Does this mean that the problem probably lies elsewhere, and not with the repaired board anymore? or does the repaired board deal with ALL video since it is called the "Audio video interface" ? After repairing the board I got sound, and previously I had no sound or image.

2. After this test I realized one thing I had never thought of, which is that when I'm in the channel source, it never shows any static noise... that's not normal is it?

I've tried looking for more cracks but I really can't see any.

Thank you.

[vol.2]

Originally Posted by polinko90

I've tried looking for more cracks but I really can't see any.

Thank you.

Cracks can be invisible to the naked eye and can require a microscope or other optical solution to spot.

Cold solder joints (component legs have separated from the solder) are almost always impossible to see by eye, and can even be hard to see with a microscope.

Your issue is most likely due to one or both of these things.

I suggest you first reflow all of the solder joints with some good quality flux and solder and then try again. Because your issues seem to center on the input board, that seems like a likely spot, especially because components that experience force (like connectors being plugged in and out) tend to have broken solder joints.

[zeno]

Some more ideas
1) with ohm meter check the fine traces & be they are OK.
2) see if the manual has a block diagram. That usually shows signal paths
& major voltages. Much easier than following the schematic with all
its lines.
3) for more cracks check the PCB that the cracked one plugs in to.
Most likely place to find more.
4) The big IC on the cracked PCB is switching. You can measure voltages & maybe get lucky ! The manual will tell you the settings to use to get
the right voltages.

Zeno