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Introduction

This guide walks through the processes of replacing the board that processes the HDMI inputs on a 2012 Panasonic Viera Plasma TV (55 inch model). If you have ever added memory or swapped a hard drive on a computer it should be similar.

I could not find a replacement part in stock anywhere online as it is no longer manufactured. However, it is possible to send your broken board away by mail to have it fixed. Mine stopped working after a thunderstorm apparently caused an electrical surge.

If you choose to do this keep in mind that you will be unable to use your TV while waiting for the board to come back. The fee for sending the board away for repair was about $95 and took about two weeks.

  1. Panasonic Viera - HDMI Input Board  Replacement, Remove TV From Stand: step 1, image 1 of 1
    • Remove the TV from the stand and place glass down on a flat, soft, and clean surface where you will have easy access to all four sides of it.

    My husband says that a plasma TV cannot be placed face down, that it must always stay upright or the TV will be damaged. My Viera owner’s manual seems to say the same.

    jyo_923 - Reply

  2. Panasonic Viera - HDMI Input Board  Replacement, Check/Confirm Model Number: step 2, image 1 of 1
    • The model number of your TV is located on the back panel.

    • This guide was written specifically for a TC-P55VT50 (55 Inch Panasonic Viera Plasma TV) model year 2012.

    • Other Panasonic Viera's may be similar - but I make no promises!

  3. Panasonic Viera - HDMI Input Board  Replacement, Prepare TV for Surgery: step 3, image 1 of 1
    • Remove the power cord and place the TV screen down on a soft surface, like a blanket.

    • The back of the TV is held in place by many small Phillips head screws. Most of these are around the edges but there are also some by the power input and media inputs. Make sure to keep these screws in a safe place!

    • Per Dave Watson's comment, as you remove all of the screws in the back that at the bottom of the TV, there are two components that you have to unscrew and remove: the WIFI and blue tooth modules. The blue tooth module has a clip at the top that must be pushed down so you can remove it. The WIFI pops right off.

  4. Panasonic Viera - HDMI Input Board  Replacement, View of the TV with back cover removed: step 5, image 1 of 1
    • With the back cover removed we can see that everything is spread out. Be careful of the copper coils in the middle as these are part of the TV's power supply.

    • The board we want to replace is located in the lower right - see red box in image.

  5. Panasonic Viera - HDMI Input Board  Replacement, Disconnect cables and ribbons from board: step 6, image 1 of 1
    • To remove the board, we first need to remove all the various connectors to it. Note that ribbon cables are a little tricky with the connector folding down onto the ribbon.

  6. Panasonic Viera - HDMI Input Board  Replacement, Remove first mounting bracket: step 7, image 1 of 1
    • Remove the first mounting bracket - note that it overlays the bottom bracket, the order that these are removed is important.

  7. Panasonic Viera - HDMI Input Board  Replacement, Remove second/lower mounting bracket: step 8, image 1 of 1
    • Remove the second mounting bracket on the lower side of the TV.

  8. Panasonic Viera - HDMI Input Board  Replacement, Remove the board!: step 9, image 1 of 1
    • Note that there is a small amount of soft silicone under the board so you may have to wiggle it lose.

    • Now that you have liberated the HDMI input board you can send it away for repairs.

    • While you have the cover off your TV - consider cleaning the two fans as mine were dusty and starting to make some noise.

    My hdmi port 1 is fine and video from cable or Roku streaming stick is super.

    When I plug into hdmi 2,3,or 4 the video is very flat and opposite of bright. Any suggestions.?

    Steve - Reply

Conclusion

To reassemble your device, follow these instructions in reverse order.

10 other people completed this guide.

Daniel Moore

Member since: 12/03/2016

431 Reputation

1 Guide authored

16 Comments

How did you know that board was the faulty part? Thanks

buyingclimax - Reply

The built in apps still worked, as did the component input. Only the HDMI inputs did not work. Plus, some googling revealed it is sensitive to power surges and we had a storm before it stopped working.

Daniel Moore -

Out of curiosity, where did you mail it for repair?

Nathan White - Reply

PTS Electronics, Inc.

http://www.ptselectronicsinc.com/

No issues, mailed the board in, waited, got it back and it worked. Never had to email or call anyone. It was $95 at the time.

Daniel Moore -

These instructions make me feel confident that I can do it. Great job thanks

John Romano - Reply

I have a Panasonic vt 55 plasma. My hdmi port 1 is fine. Hdmi 2,3,4 have very week video signal when using cable or Roku streaming stick

Steve - Reply

Thanks for the instructions, i checked the shop that fixed your board and it costs 125+ shipping both ways. which puts it closer to 145 for the repair. Any idea what they actually did to fix the board so I can try to save money and fix it myself? Also, I’ve seen some youtube videos repairs using a heat fan the reflow the connections, but heard that this fix is only temporary. Did the fix done by PTS electronics last a long time?

Lee Xie - Reply

It is still working 3 years later… knock on wood!

Daniel Moore -

Where did you send the board to have it repaited

Aj53141958 - Reply

Where did you send the board off to

How do you tell what is really bad? My TV just stopped working and now the red lights just blinks on and off like it it trying to come on but can't. How do I know it is the mother board that needs replacing?

Aj53141958 - Reply

My viera is only 60Hz I wanna replace it with a board with a higher refresh rate and because its plasma it can handle it I run it as a video monitor on my PC!

frank whte - Reply

Thanks so much! Because of this article I was able to fix my TV. Brilliant job!

mjferreras - Reply

Thanks for the help Daniel. My board is repaired and on the way back from PTS as we speak. Just wanted to add that as you remove all of the screws in the back that at the bottom of the TV there are two components that you have to unscrew and remove, the WIFI and blue tooth modules. The blue tooth module has a clip at the top that must be pushed down so you can remove it. The WIFI pops right off.

Dave Watson - Reply

Thank you - I updated the guide with this information.

Daniel Moore -

Would like to breathe some fresh air into this post because it is still getting daily views. Though the job itself is simple, finding an affordable repair service has only become increasingly difficult. Would like to know of any such services used in 2021-2022 with positive results, as the service used by OP is not currently available. So far my best quote is $190

Andrew Lazlo - Reply

Any luck Andrew? My Panasonic viera hdmi board is broke too.

doc_olsen -

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