Question about Panasonic TH-42PX50U 42 in. Plasma HDTV

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My HDMI is not working . I believe it was shorted out by a power surge. What can I do to fix this problem. My set is a Panasonic TH-42Px5OU. All other video ports are working properly.

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  • 12 Answers

Replace the hdmi cable. I've stepped on an hdmi cable and broke something internally and had similar issues.

Posted on Dec 01, 2012

  • Randy Watson
    Randy Watson Dec 01, 2012

    Actually I swapped cables with another tv and it works fine. I fear it may have fried the board.

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SOURCE: I am trying to connect my macbook pro computer to

On the MacBook, check the Displays pane in System Preferences to make sure the settings for the external monitor are correct. It's possible that the system is not recognizing the adapter or it has the wrong resolution setting, so it's not sending out any signal that the adapter can use.

Many of the better DVD players and high-end video game consoles use HDMI. You can use one of those as a test signal generator to check the TV.

You may get better results if you use a DVI-HDMI converter, although you would need to get the DisplayPort to DVI cable. This will avoid converting to analog VGA signals and back to digital again.

Posted on Oct 13, 2010

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SOURCE: I cannot install a new PS3 Slim to a Panasonic

have you told the ps3 you want it to work through the hdmi cable?? it wont automaticly do it

Posted on Apr 24, 2010

radar001
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SOURCE: HDMI inputs are not working

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.

Posted on Dec 17, 2009

welcomejee
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SOURCE: Panasonic TH-42PX60U HDMI stopped working

Please unplug TV from AC outlet and replug it after 5 minutes then check HDMI port.

Posted on Nov 28, 2008

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SOURCE: Can't play my PS3 through the Panasonic TH-42PZ800A

your HDMI output is bad

Posted on Jun 14, 2009

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The HDMI switcher IC chips in TVs can be damaged but lighting hits near you house even if the power is protected with a surge protector. The damaging power comes in through the HDMI port and blows the chip out and it can affect just one port or multiple HDMI ports. Your best bet would be to just get a cheap HDMI switcher and use the one working port. The repair on the TV would require placing the control board and would run from $75-150 for parts plus the labor to install it.

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I can't find a manual for this thing, which I believe is part of the SC-PT480 package.

I'd plug it straight into a wall outlet for further fault isolation and treat it like it has never worked, no assumptions.

Surge protectors only address outside power surges. Overheating, speaker shorts yada yada can still happen. Effective self-protection circuitry activation need not be preceded by smoke and light shows.

When the audio cut off did the unit also die, or did it look otherwise alive? If the former...

Generally speaking, an amp protects itself from heat, shorts and overloads by refusing to turn on or stay on.


Overloads can be from excessive periods of high output or marginally low impedance loading by the speakers; and shorts would be wiring issues or a speaker blowing up.


You should be able to feel if it's hot. WHY is it overheating? Make sure it has sufficient ventilation on all sides and that vent holes are not blocked by dust balls. Ensure the fan (if equipped) is running as designed (some only operate on demand). Clean dust and debris from it.


If the amp comes back on after cooling, you're lucky. They only have so many self-protection cycles in their lives so continuously resetting or cycling their power without addressing the cause can do more harm than good.


If it protects immediately on a cool power up you should disconnect the speaker connections and try it 'naked'. If it comes up then diagnose which lead(s) are shorted. If it does not come up the problem is internal and should be left to an experienced and competent hands-on tech.


Check for loose speaker connections as a root cause for intermittent shutdown.


Maybe a sleep timer clicked it off. Or if it seems to power on but remains silent some other setting like muting, tape monitor got activated. Or the source audio died. Lots of things.

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The warranty does not cover lightning, check if your insurance covers it.
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