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Old 07-04-2020, 08:53 PM   #1
nickba
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Default LG Plasma 60PG70FD image noise and Self test

Hello,

I have a LG 60PG70FD Plasma TV and suddenly the image became noisy with pink grain. It is an intermittent problem, sometimes it goes back to normal and after a few seconds it becomes noisy again.

I removed the ZSUS and YSUS boards. I tested for shorts and didn't find any. Removed some caps and tested ESR and capacitance, all OK.
I resoldered all ZSUS DIP components(including the inductors coils).
For the YSUS I resoldered all the inductors.
Vs and Va voltages are correct.
-Vy voltage is correct.
Z bias voltage is correct.

While trying to diagnose it, I found a way to activate the self test of this TV, as I searched everywhere and didn't find it. You just need to short pins 1 and 2 or 3 and 4 of the connector shown in this picture I took.
In my TV, the self test have the same noisy picture.



Do you have any tips of how to solve this issue?
Attached Images
File Type: jpg AUTO_TESTE.jpg (1.08 MB, 7 views)
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Old 07-05-2020, 08:22 AM   #2
dick_barton
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Default Re: LG Plasma 60PG70FD image noise and Self test

There's a possible page that could help
https://www.badcaps.net/forum/showpo...3&postcount=58
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Old 07-05-2020, 08:43 AM   #3
nickba
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Default Re: LG Plasma 60PG70FD image noise and Self test

Thanks for replying. Unfortunatelly the suggested link didn't help. Any other tips?
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