Question about Panasonic VIERA TH-42PX80B 42 in. Plasma TV

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My Panasonic Plasma Tv - the HDMI outputs have stopped working - if I choose Sky box, or xbox, I only get a black screen - normal TV and input from PC fine....

I have a Panasonic TH-42PX80B plasma tv - as of about 2 weeks ago, the HDMI ports/output has stopped working - when switch to either of the HDMI's, it's as though the TV doesn't know about the device...screen goes black and never seems to 'detect' either the Sky box, or the xbox360. Normal TV is fine and connecting the PC (via VGA input) is fine. I have run the self-check test, and it would appear to be fine. Can anyone help?

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Posted on Jan 02, 2017

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SOURCE: Panasonic Plasma Monitor TH-42PWD7B - Convert to TV screen?

hi yvonne not sure if you sorted this but using this lead should get you sorted

http://www.maplin.co.uk/Module.aspx?moduleno=4702

the phono blugs ae used for audio and bnc plugs on the back of your panny are for the video

Posted on Oct 28, 2009

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tvservice306
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SOURCE: Panasonic TH-46PZ85U Plasma TV

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
time. The cable that causes the TV to enter the protection state is connected to the product
that has the excessive voltage (and signal). Avoid connecting this product until an isolating
connector is found.

Posted on Jan 27, 2010

  • 1 Answer

SOURCE: Sony Viao HDMI to Panasonic Plasma TV HDMI Input handshake

My TV turns off while watching and message pops "Plasma no signal " . Please tell me what to do . Thank you

Posted on Jul 11, 2011

  • 139 Answers

SOURCE: I have Panasonic th42 plasma.i m playing xbox360 for a year on hdmi port 1 .but 1 day when I turn on my TV than my Xbox the screen is showing black than change the port to 2 than port to 3 same proble

It sounds like you did some good testing by taking your xbox to a friend's home and trying it with his TV and HDMI input. You can try a reset on your Panasonic TV and see if that restores the HDMI input functions. Note this will erase your programmed TV channels so you'd need to re-enter those.

  1. Unplug the TV for at least 15 minutes
  2. Plug it back in and you'll be prompted to go through the initial setup just like when the TV was new.
If after that you still have no HDMI function on any of the inputs, that would indicate the set needs some service by a technician.

Good luck.

Posted on Mar 21, 2015

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regards
shaun

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1 Answer

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are you using a PC to feed a signal or maybe a cable with an adapter?
I had the same issue when I used one of the rear HDMI ports to show a PC display. Apparently there is a software difference between the rear and side/front ports. Inputting the PC through the side HDMI port has solved the problem for me (so far!)

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