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New Panasonic Plasma-color loss when changing station

My new panasonic (equivalent to PZ80U) uses an HDMI input from a digital cable box (with adaptor at box). The picture is excellent(never calibrated). Sometimes when changing a station, the new station will have some pinks and greens but otherwise the picture will be gray. When returning to the prior station, the colors are fully restored, usually. The only method to correct is to turn the set off and turn it back on. Does the TV have a defect? Could the color loss result from a switch from an HD station to a cable, non-digital station? Please advise as the warranty is running. Thanks.

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  • Anonymous Apr 28, 2009

    I have my tv hooked up to direct tv thought it was my dvr box

    technician said my Hdmi is out tv is only 16 months old out of warrenty

×

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WHAT TYPE OF ADAPTER BOX DO YOU HAVE!

Posted on Apr 26, 2010

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Panasonic TH-46PZ85U Plasma TV All 3 HDMI was working fine with cable box, PS3, XBOX360. I used to connect my pc to the tv with a dvi-hdmi cable, but recently unplugged it. So I tried to plug in the same...


Symptom:
TV shuts off unless all the input (phono and HDMI) cables are disconnected. The
symptom may be intermittent.
Cause:
There is an abnormal AC voltage entering the TV from one of the input cables or AC
outlet.
Remedy:
Follow the Testing procedure to determine if there is a problem external to the product.

Concept
Constant symptom
If the TV no longer shuts off when all input cables are disconnected, then one of the
input cables is introducing abnormal voltages into the TV. Panasonic Plasma TV sets
have 3 wire AC plugs.
As a result, abnormal voltages introduced into this TV will cause the TV to shut off for
protection.
Intermittent symptom
If the abnormal input voltage is borderline (marginal), the TV shut off symptom may be
intermittent. However the cause may still be detectable with a voltmeter.
Protection Proof:
Release the protect mode - the TV has to be unplugged to reset this protection circuit.

Threats from the HDMI input:
Excessive voltage from an HDMI cable connected product will activate the Plasma TV’s
protection circuitry. Placing an isolating / buffering connector (sometimes called a voltage
conditioner) between the TV and the HDMI input cable often solves the problem.
Testing -
Unplug all the HDMI inputs from the TV. Turn on the TV. Plug in the HDMI inputs one at a
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2 Answers

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As crcelect suggests you can run the TV on RCA. You should also be able to use coax directly from your cable box. If you don't have cable you can use an rf converter to connect coax.
I have exactly the same problem with my Panasonic TH-42PX75U. I've been told that I may need to run a setup on my cable box to fix the problem. If I find a solution I'll provide details in a future post.

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Panasonic didn't make it a simple matter to connect a computer to this TV since they didn't include a VGA input connector. You can still do it, but it will require some adapters or changes to your PC.

If you're using a laptop, you have two options. If the laptop offers an s-video output, you can use a suitable cable from there to one of the set's s-video inputs. If there's no s-video output, the other option is to purchase a VGA-to-component breakout cable, available at a number of online vendors (search with Google). This cable has the VGA connector to the computer on one end, and 3 RCA plugs at the other end. You would use this cable into one of the set's component video inputs.

With a desktop PC, you can still use one of those two options. In addition, there may be a DVI video output connector available as well. This is not common on computers with integrated video, but is frequently found on many newer expansion video cards. If your computer has this connector (or you install a new video card with one), you can use a DVI-to-HDMI adapter and connect an HDMI cable to one of the set's HDMI inputs. Many video cards with DVI outputs include one of these adapters already.

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1 Answer

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