Question about Sony PFM-42V1 42 in. HD-Ready Plasma Television

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Pulsing/strobing on black screens or dark backgrounds

Hello
I have a 3 year old Sony Plasma (PFM 42V1) and there is a noticable "pulsing" or "strobing" on any all black screen or dark scenes in movies. This is present on all inputs. I have checked all connections and they appear in good order. Any advice?

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  • 1,635 Answers

It is very likely that there are electrolytic capacitors going high in ESR on the processor and driver boards, and also in the power supply areas. The tech should be able to see this by monitoring supply distributions with a scope.

Depending on the complexity of changing the caps on the boards (if it is actualy a cap problem), the best choice may be board replacements.

In almost all the cases where I had this type of fault, it was a number of capacitors that had to be replaced.

Jerry G.


Posted on Apr 14, 2008

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Unfortunately it sounds like the video processor or a capacitor inside the TV has started malfunctioning, causing the vertical lines. I recommend contacting where you purchased the TV from and ask for help regarding a repair or replacement if it's still in warranty.

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1 Answer

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