Question about Panasonic TH-42PX500U 42 in. Plasma Television

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My Panasonic TH-42PX500U just started displaying raster blue horizontal lines. Maybe 8-12 from left to right at what looks like a 60 Hz bandwidth. This displays when source is HDMI/RF, although when I turn off all sources it does not display.

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Hello:
If the lines are 2 or more inches wide and stationary then this could mean a bad buffer board, when ever the lines are thin less then one inches wide then this indicates a bad panel. Now if the lines are moving then its possible that you are getting a 60 cycle humm in one of your inputs. Or the power supply is causing the problem, to be honest the most common failure in panasonic plasmas is the power supply. I would turn on one source at a time to see which source is causing the problem. One of the sources may have a defective power supply and sending the hum into the unit.

Posted on Sep 06, 2010

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Posted on Jan 02, 2017

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