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Repair service for TNPA5340 / TXNSU1PAUU SU buffer board for Panasonic TC-P55GT30 TC-P55ST30 7 blinks problem

We offer a repair service for failed Panasonic SU board TNPA5340 / TXNSU1PAUU used in Panasonic models TC-P55GT30, TC-P55ST30 and possibly others. See listing for important information!

Coppell TV Repair LLC offers REPAIR SERVICE for Panasonic SU board TXNSU1PAUU / TNPA5340 shown on the pictures and used in Panasonic TC-P55GT30, Panasonic TC-P55ST30 and possibly others.


Advertised price is the maximum price you will pay and includes the return shipping costs within USA. Surcharge applies for international returns.

You start the process through the orange button on the page by filling a short form with your contact information and a brief description of the problem.

An email with shipping instructions is automatically sent once you submit the form to the email address you provide.

You then package and send the board to us. You pay for the shipping to a carrier of your choice and nothing to us at this point.

Once we receive the board and open the box we test it and act depending on what we find out.

If the board arrives in working order you will be charged with a a diagnostic fee of up to $25 plus the return shipping costs, i.e. less than the advertised repair cost.

If the board is bad then we attempt to repair it.

If we succeed we send a payment request for the amount specified in the listing.

If we fail to we send you an email with details and usually only request that you pay for the return shipping and nothing else.

Please make sure your TV has the same board before proceeding with this service or contact us if yours is different to see if we offer repair service for it.


A failed Panasonic TXNSU1PAUU / TNPA5340 SU board or TXNSD1PAUU / TNPA5341 SD board will cause failure to power on the TV and 7 blinks at the front power LED indicator.

Each buffer board can and should be tested for shortage as shown on the below videos.

Accompanying article can be found at

More impotantly, as the video shows, a failure in either buffer board (SU or SD) is often times accompanid with failure in the SC sustain board.

We offer a repair service for the SC board TNPA5351 as well and we STRONGLY recommend that you test and send that board as well; you can initiate the repairs service for either of the boards and send them all along (SC, SU and SD).

Typical turnaround time is 2-3 business days.

This is the time it takes for a package that was received to move up the queue and get opened.

Once we open the package we usually have about 1 hour to get the case resolved or we will likely end up losing money on it.

Sometimes, depending on situation, we may leave opened box and make another try on the next day.

Note that it is not guaranteed that the queue will take exactly 2 or 3 days to process. Sometimes - especially after long holodays - it can be larger and take longer.

We do our best, but we have no efficient means of managing the work load on demand.


Unless otherwise explicitly stated elsewhere in the listing the boards we sell come with a standard 90 days warranty.

Customer is responsible for return shipping and Coppell TV Repair LLC is responsible for shipping back to customer. Returned boards subject to exchange, service or refund, subject to availability and agreement by Coppell TV Repair LLC and customer.

Returned boards must carry the Coppell TV Repair LLC identification stamp or label and must not have been damaged, modified or otherwise tampered with in order for warranty coverage to remain in force.

Boards returned with request for refund / order cancellation will be subject to restocking fee covering forward shipping cost, transaction cost and $10 fee for the board testing needed prior to slating it for sale again.


The board(s) we receive must be physically intact and must have not been tampered with or serviced before.

The advertised flat rate for repair service is only valid when the above conditions are met.

Exceptions are possible and often applied for minor repair attempts, but we reserve the sole right to judge if and when we would consider a repair minor.

If we receive board(s) that fails the above conditions we will contact the sender and usually offer two options: 1) returning the board(s) for the sole cost of the return shipping; or 2) continuing the repair service at a higher cost in case of success.

It is also possible, depending on the condition of the board, to eliminate the second possibility and just flat our reject having to service the board.

Subject to situation and availability we may also recommend replacement of the board, again at the higher than advertised price for repair.

In all cases you will have the option to receive your own board(s) back for the sole cost of the return shipping.