So both Y-main and X-main would appear defective. Can you repeat testing on Y-main with X-main unplugged?
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So... more or less the same. I would try replacing Y-main first. The one you got appears defective.
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It is actually a surge arrestor and shouldn't normally light.
One thing I did not immediately consider was the possibility of the control board being bad.
Can I see a picture of the control board on your TV? I think it's under the main board on this mode.
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OK, can you check along this connector on each of the points I mark.
Set scope to 100us/div and centre horizontal (press the "HORIZONTAL POS" knob.)
If you see no waveform (more or less straight line), note that.
If you see a waveform, please take a picture or screen capture.
Attached Files
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NO waveform ....and how did you do the drawing on the photo?
I used GIMP image editor, it's free software and works great.
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