Question about Panasonic TH-42PX75U 42 in. Plasma Television

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Arcing noise coming from TV

I have noticed some arcing noises coming from the TV every couple of minutes. The picture is fine, but the noise is pretty annoying. Any suggestions as to what is causing this or possible solutions?

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Clicking, popping noise on certain channels. All connections checked for tightness, and sound is isolated to the TV, not cable box or home theater. What is the cause and fix? Does it involve an inhome service call?

Posted on Jul 19, 2008


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G noise then loss of picture and sound

is that for over-the-air signal or HDMI or other cable source?

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High pitched noise from inside the TV when picture comes on

Hello randapaint,

This might be from the IHVT (Integrated High Voltage Transformer), or more specifically a short in the IHVT causing it to arc, producing the high pitched whine, you are hearing. Take the back off of the TV and try to detect where the sound is coming from, more then likely you will notice it coming from the section that contains a large component with a large red cable coming from it, to the top of the CRT (picture tube). Replace the IHVT (with the exact same model) if it is bad.

I hope this helps,

Thank you,


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Loud popping noise

The 23" CRT set may have a high voltage breakdown in the flyback transformer or focus divider. Take the back off and operate the set in a dark room. Look for anything that has a blue glow around it or sparks flying when the pop occurs. I won't guarantee this will find your problem, but it is definitive if you see these!

I once had a set with these symptoms. I stopped the blue glow and arcing by covering the focus divider with epoxy. It worked for a couple of months before the divider literally broke apart.

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Toshiba tv making crackling noises

Is the sound coming from the speakers or from inside the tv, like an electrical arc? It could be the high voltage wire going to the picture tube. Do not attempt to test this yourself as there is many thousands of volts on that wire even when the tv is turned off. That wire attracts dirt that may be causing it to arc.

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