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Repair service for Samsung PS-426-PH / LJ44-00143A / 996500045386 power supply - dead or clicking on and off TV

Repair service for power supply board PS-426-PH / LJ44-00143A / 996500045386 used in Philips and Magnavox plasma TVs


Coppell TV Repair LLC offers a REPAIR SERVICE for power supply board PS-426-PH / LJ44-00143A / 996500045386 shown on the picture and used in Philips 42PFP5332D/37 and Magnavox 42MF237S/37 plasma TVs.

REPAIR SERVICE means that you have to send us your malfunctioning board that we will attempt to service, test and return to you.


To have us examine and possibly repair your board(s) you need to send them or bring them to us.

Start the repair service request through the "Initiate service request" button on the page. Repeat customers are advised to log-in and new customers will have to fill-in a short form with contact information needed for communication and invoicing.

An email with shipping instructions is automatically sent once you submit the form to the email address you provide; it is also shown on your screen.

Following the instructions you package your board(s) and attach the first page of the shipping instructions so that we make a link between the boards and the service request when we receive your package.

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

Presently we do not charge in advance, but only after inspecting and possibly servicing the board(s) we receive.

The price shown is for evaluation, repair, test and return within USA of the boards listed in the title or explicitly named in the listing, provided they meet our requirements upon arrival (see related section).

Boards returned abroad tend to have higher shipping cost that will increase total cost of service beyond the amount shown.

Once we receive the package and open it we inspect the board(s) sent.

If the board(s) do not meet our criteria we communicate the problem with you and offer options, the first of them being returning the board(s) back for sole cost of return S&H. Other options may include surcharge for board restoration, board replacement, change of pricing or warranty terms etc.
We may not give any options and simply reject to service a board that was damaged beyond repair (see example here).

If the board(s) pass our criteria we conduct test to determine functionality.

If test passes OK and board(s) appear in working order we communicate that and offer options, among which returning the board(s) without change; we invoice a testing fee and return S&H charge.

We test all boards that are being sent and for every board we test we assess testing fee as described.

If board(s) come in assemblies that require additional dismantling on our end (i.e. with more than what is shown on the pictures) we reserve the right to charge up to $10 for dismantling and re-assembling what was sent plus eventually additional shipping costs if resulting assembly requires larger box and/or is heavier than the regular board as shown.

Boards that test out bad are analyzed and we attempt to repair them.

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

If we fail to repair the board(s) 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.

Failure symptoms

There are several different symptoms of this power supply board's failures.

One is a completely dead TV - no front LED, no response to anything, buttons or remote.
Note this may also be an indication of a bad main board.

Another common indication is a pair of clicks when you try to turn on the television: one that activates the power supply board followed by another one that turns it off.

This may also be caused by something outside the power supply board.

There are two indications that will help you increase the odds of having narrowed the problem to the power supply board.

First, take the back cover off the TV and look at the lower left corner of the power supply board, where there is a row of 4 connectors. Just below the fourth (from left to right) there is a green LED on the board, which is lit in green when the board is functioning properly and blinking when there is a problem.

If the board was shut down due to a problem the number of blinks before a longer pause indicate an error code.
While not 100% certain that the problem is in the power supply, it is a good indication it might be and it is at least certain the reason for the shutdown was power related, even if not necessarily a failure in the power board.

Second, as this is another common source of a problem in those TVs, disconnect the cable connecting the Y-Main board with the power supply board and try to power on again to see if the TV is still refusing to come on.

Y-Main sustain is the board sitting to the leftmost side of the TV when looking from the back.

It is worth doing the same exercise with the ZSUS sustain board, which is sitting at the rightmost side of the TV when looking at the TV.


In that second case we recommend disconnecting the Y-Main board from the power and trying again; if the problem persists then it is more than likely that you have a bad power supply board, otherwise you are likely having the infamous Samsung Y-Main/buffers failure (which we also offer repair service for).


All packages we receive are placed in a FIFO processing queue.

It takes 2-5 business days for a package to make its way from the back to the front of the queue.

Once picked up for processing, we make money if we manage to fix the board(s) inside for between 30 and 60 minutes.

Of coruse that isn't always possible, not to mention sometimes there is more than one board in a package.

Add to it that we can't know how many packages we will receive at any given day, how many boards will each contain and how bad the damage on them could be.

Please do not call us a mere few days after you sent your package to inquiry about the status of your service...we just do not have the resources to be giving the same answer to everyone and it only slows us down!

Look at the tracking number, see when it was delivered, give it at leat 2-3 business days (preferably four) and if you have not heard anything from us then contact us saying the package was delivered on this and that date and we'll go look for it.

It's in everyone's interest that we work as fast as possible and interrupting technicians (who answer the phones) to make them go search for package in the queue only to tell you it's there doesn't help anyone.


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.