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Replacing Panasonic A Board

post #1 of 47
Thread Starter 
The A Board in my Panasonic 42PX80U needs to be replaced. It did the exact same thing in January when it was still under warranty and they fixed it by replacing the A Board, but now it is 5 weeks out of warranty. I'm waiting for a call back from Panasonic to see if they will still cover it since this had been a problem before. If they don't cover it, I need a plan B. I've swapped out electronic components before. but I still have a few questions:

1. Is leaving the TV unplugged for a significant period of time (it will take several days to get the part) enough to discharge the power? Death or serious injury would not be a successful outcome .

2. How is the A Board attached? Screws or special connectors?

3. Are any special tools needed to remove and replace the A Board?

4. Is any soldering necessary?

Any help would be greatly appreciated. Thanks!

Gear mentioned in this thread:

post #2 of 47
Its not 12 months since the replacement was installed so my guess is they will replace it.
If they give you any static, escalate the call up the chain.Many have reported that Panasonic has stepped up to the plate and taken care of its customers and thats even without your prior repair to the same part.
post #3 of 47
Thread Starter 
Unfortunately, Panasonic called back and said that it will not be covered. So I'm basically on my own. I downloaded the service manual and figured out the answers to the questions above. It seems pretty simple.

One thing I'm not sure about. What is the difference in TNPH0716AGS found in the TH42PX80UA and the TNPH0716S found in the TH42PX80U? All the parts listed on the popular auction site are listed as TNPH0716 without any suffix pulled from various models including TH42PX80U. Mine is the TH42PX80UA. I found a parts place that lists the TNPH0716AGS, but it is three times more that the cheapest ones on the auction site that may or may not be the same part.
post #4 of 47
Thread Starter 
One last update that may be helpful to someone in the future who runs into the same problem. According to the service manual, my set needed TNPH0716AGS. The boards just have the model number TNPH0716. To find out which variation the board is, you apparently have to look at the serial number. The board I took out had “AG2” at the end of the serial number and the board I bought at the auction site had “AG” at the end of the serial number. This made me a little nervous, but I figured they were most likely both the “AGS” version.

The installation was problem free and the TV is now working perfectly. Some of the electrical connections were a little difficult to disconnect, but I was able to get them all loose by applying gentle pressure from various angles. I was able to find the service manual at http://elektrotanya.com/panasonic_ch...f/download.cgi. The main information you need can be found on pages 6 and 18.

The answers to my questions above are: 1. Yes, 2. Screws, 3. No, and 4. No.

When I took off the back cover, I felt like I was really in over my head. Now I feel truly blessed to have had such a positive outcome to this problem.
post #5 of 47
Congrats on resolving it yourself. I think that those type of situations are going to force me to get my first HD set (Panny 42x1 (or x14) from Sam's)!


Jeremy
post #6 of 47
Nothing gives you more satisfaction than fixing your own TV. I had a flat panel panasonic TV. I have replaced the fuse quiet a few times. Even that gave me satisfaction. Definitely an useful experience to share.
post #7 of 47
Thread Starter 
If I had known what I know now, I would have definitely bought it at Sams or Costco. Everyone is saying that the Sams return policy is changing November 1 to 90 days. The Costco site still says 2 years.

I'm not too upset with Panasonic since the set was out of warranty, but it does seem like they would stand by it since the same part went out twice in less than 14 months from the date of purchase. My mother-in-law has me looking for an HDTV for her. This experience makes me apprehensive to recommend Panasonic.

Hopefully I won't have this problem every few months. I think this is likely surge related since there were thunder storms in the area both times this happened, but nothing else in my house was damaged so I can't be sure. I bought a better surge protector with coax protection just in case.
post #8 of 47
if it were me....i'd escalate to higher ups in the panasonic support chain. Sounds ridiculous to have the same part fail yet again in the same year.
post #9 of 47
Quote:
Originally Posted by randy_in_tn View Post

If I had known what I know now, I would have definitely bought it at Sams or Costco. Everyone is saying that the Sams return policy is changing November 1 to 90 days. The Costco site still says 2 years.

Sam's goes to 90 days after November 1st. IIRC, Costco is already 90 day return policy.

The extra bonus with Costco is that they extend the warranty to two years. But you could get the same amount of warranty at Sam's too by using a credit card that extends warranty an extra year (i believe they accept mastercard now).
post #10 of 47
Hello randy_in_tn
I need to replace the board to but I do not known how to remove 3 flexible cables (thin rubon cable, 2 at the bottom, 1 on midle left of the board)
Could you help me a lesson how to remove it and put it back to the new board.
Thanks
post #11 of 47
They come off by lifting the thin black latch that is right where it looks like the cable connects. I had to replace mine two weeks ago on my 42px80u. It corrected a 10 blink error I was getting. Ordered the board from discount-merchant for under $60.
post #12 of 47
Thanks Finoky,
I will change it out this weekend (hopefully), I had 3 blinks error and I have 42PX80UA. I hope it will work again.
I did try to lift the latch but the flexible cable is hard to pull it out. Do I just to pull it out?
thanks
post #13 of 47
I was like you. Pulled on the cables and they wouldn't budge. Then I started to fiddle with them a little more and discovered that they easily came out once I lifted the thin black plastic edge up right where it looks like the cable connects. It's what helps secure the cable in place.
post #14 of 47
Hi guys,

I've got the same issue with a Pan TH-C50HD18- got a free estimate that the A-board is bad and they want $420 to repair it. I got the SM download so I'm gonna take a shot at replacing myself.

Can anyone point me in direction of getting the board?

Thanks!
post #15 of 47
Quote:
Originally Posted by trima View Post
I've got the same issue with a Pan TH-C50HD18- got a free estimate that the A-board is bad and they want $420 to repair it ... Can anyone point me in direction of getting the board?
You may want to try eBay, for something like this. However, it is best to look at the numbers on your A-board first, and ask the seller for their numbers, for comparisons.
post #16 of 47
Quote:
Originally Posted by randy_in_tn View Post
I'm not too upset with Panasonic since the set was out of warranty, but it does seem like they would stand by it since the same part went out twice in less than 14 months from the date of purchase. My mother-in-law has me looking for an HDTV for her. This experience makes me apprehensive to recommend Panasonic.
I feel your pain. We had a similar experience that not only soured me on the manufacturer, but on PDP in general.
post #17 of 47
New guy here and need some help. I have Panasonic Model TH50PZ80U. Manufactured 9/08 purchased 12/08. I'm sure my A-board is bad. My question has to do with the numbers on the A-board.
Service manual calls for #TNPH0721AFS
The board # is TNPH07213A with the 3 being circled and the A with a square around it.
The stamped # above the board # is MV8254AL2

Can someone please tell me which replacement A-board I need and a reliable supplier. Thank You
post #18 of 47
Quote:
Originally Posted by Roscoe294 View Post

I have Panasonic Model TH50PZ80U. Manufactured 9/08 purchased 12/08. I'm sure my A-board is bad. My question has to do with the numbers on the A-board.
Service manual calls for #TNPH0721AFS
The board # is TNPH07213A with the 3 being circled and the A with a square around it.
The stamped # above the board # is MV8254AL2.

Your TV was made in Sept 2008, just when Panasonic was transitioning from the U models to the UA models. To be sure, there should be a small sticker on the left side of the rear cover which tells you the actual manufacturer ID, such as TH-50PZ80U or TH-50PZ80UA. The A-boards are usually not interchangeable between these versions.

The TNPH0721 A-board was used in at least three different size models, the 42", 46", and 50", but each size can use a different version of that A-board.

The best way to find a replacement board is to exactly match up your numbers, which will be hard to do because most sellers do not list all the numbers. Next best is to be sure that the replacement A-board came out of an identical TV.

There are sellers on the net or eBay that will accept returns if the board purchased does not work. Usually there is a restocking fee, as well as return shipping costs.
post #19 of 47
Quote:
Originally Posted by tomwil View Post

Your TV was made in Sept 2008, just when Panasonic was transitioning from the U models to the UA models. To be sure, there should be a small sticker on the left side of the rear cover which tells you the actual manufacturer ID, such as TH-50PZ80U or TH-50PZ80UA. The A-boards are usually not interchangeable between these versions.

The TNPH0721 A-board was used in at least three different size models, the 42", 46", and 50", but each size can use a different version of that A-board.

The best way to find a replacement board is to exactly match up your numbers, which will be hard to do because most sellers do not list all the numbers. Next best is to be sure that the replacement A-board came out of an identical TV.

There are sellers on the net or eBay that will accept returns if the board purchased does not work. Usually there is a restocking fee, as well as return shipping costs.

Ok thanks for the help, I will check the exact manufacturer ID. But what numbers do I have to exactly match up? The number in the manual, on the board, or the stamped # on the board? I found the exact # the manual calls for on shopjimmy but it is out of stock. Im guessing the # with AFS is the one I need or am I wrong? Thanks
post #20 of 47
Quote:
Originally Posted by Roscoe294 View Post

Im guessing the # with AFS is the one I need or am I wrong?

It depends on what version TV you have. The U and UA models have separate service manuals, each with different part numbers.
post #21 of 47
Update The model I have is the U model. The service manual I have is for the U model.

thanks
post #22 of 47
to the top

help!
post #23 of 47
Quote:
Originally Posted by Roscoe294 View Post

Service manual calls for #TNPH0721AFS.
The board # is TNPH07213A with the 3 being circled and the A with a square around it.

If you are trying to find #TNPH0721AFS, you will have to order from Panasonic, which will have that number on the package but not on the board. See the following example of a package from Panasonic with a representative part number on it:



ShopJimmy lists the #TNPH0721AFS, but shows the board as TNPH07211A.

eBay has the TNPH07213A, that claims to have come from a TH-50PZ80U.

That's all I can advise. If you want to be perfectly sure, you need to order from Panasonic.
post #24 of 47
ok thanks for the help Tomwil
post #25 of 47
can some one say there can u find a tnph0716s board from
post #26 of 47
Quote:
Originally Posted by hititup View Post

can some one say there can u find a tnph0716s board from

By searching auction sites and online retailers of parts. If you just search for the part number you're likely to get results. From there you can search for the best price from a reputable seller.
post #27 of 47
Thanks.. i try searching and find lots of A board with the suffix and my board don't have any suffix on it. So how do determent what board to replace it with.. Here is some info on my TV: model # TH-42PX80U but on the back side cover have manufacture ID # TH-42PX80U A ( see in pic attach) and and at the usual place have TH-42PX80U (see in pic attach) i can see part of the a # on the A board # MF8214AG
pls help.
LL
LL
LL
post #28 of 47
Quote:
Originally Posted by hititup View Post

Thanks.. i try searching and find lots of A board with the suffix and my board don't have any suffix on it. So how do determent what board to replace it with.. Here is some info on my TV: model # TH-42PX80U but on the back side cover have manufacture ID # TH-42PX80UA ( see in pic attach) and and at the usual place have TH-42PX80U (see in pic attach) i can see part of the a # on the A board # MF8214AG
pls help.

I think that you need to be sure the TNPH0716 is on the middle of your board, and the "AG" suffix on the bottom-left corner of the board as well.

post #29 of 47
To sum things up.. i should look for TNPH0716AGS of this set? i attach a PDF file with info.. So what is my model TH-42PX80UA or TH-42PX80U??? this set is driving me mad..
I email National Parts Center and they said i should get TNPH0716S.

 

TNPH0716AGS 2008-Board-Recommendations-080923.pdf 159.158203125k . file
post #30 of 47
Quote:
Originally Posted by hititup View Post

I should look for TNPH0716AGS of this set? i attach a PDF file with info.. So what is my model TH-42PX80UA or TH-42PX80U???

You have the TH-42PX80UA, which your attached image shows. You must use TNPH0716AGS for this set, unless you also want to change the SC board to match, with complicated results.

You can read my adventure of using a TNPH0716S in a TH-42PX80UA here, which I corrected later by using the proper TNPH0716AGS.

There appears to be a board available on eBay that might fit your needs.
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