2011 Samsung 51" Plasma clicking no power on - some progress made

[scotty562]

Hi guys. I've come into possession of a pn51d530a3fxza. Hopefully I'm using the correct terminology. I did try searching and I found a lot of posts with similar issues, but very very few ever come to a resolution which is why I'm posting.

Symptoms:
The tv does not power on. It tries about 6 times and the relay on the main power board clicks as it tries.

Troubleshooting:
I visually inspected the boards and couldn't find anything obvious like puffed caps.

The second thing I tried doing was unplugging the y-main. When I did this the tv did its power on jingle . Next I plugged the y-main back in and tried unplugging the x-main and I then got the same jingle. So from my research it's looking like I need a x-main board. On this tv the power goes into the y-main and then from the y-main into the x-main.

Also from my research it looks like defective firmware caused a lot of problems in these models with the x and y mains, but I looked on Samsung's website and the firmware that's available for my tv is older than the tv is which is troubling. I guess it's possible they put old firmware on the tv during manufacturing. This info may not apply to my exact model though I'm not sure.

Next I looked at x-main boards on ebay. I put the model number that is listed on my x-main and the results are x-mains that look similar, but are slightly different. I'm assuming this is just a different revision? All of the connectors were in the correct places.

So basically what I'm looking for are recommendations before I buy an x-main.

Pictures:
In my post the y-main I'm talking about is on the left and the x-main is on the top right. The img tag doesn't seem to be working for me so I put the url for the picture below it.


http://imgur.com/toflbaF <-- picture of back of tv with cover off.

http://imgur.com/c67macw <-- this is what the ebay x-main looks like. It's missing a cap that the one in my tv has.

Another thing I'm finding is some people are recommending replacing the y-main as well because it might be what's causing the x-main to fail. Is there any way I can test for this? It'd save me $30-$40 if I didn't need to buy the y-main as well.

Another thing I thought of was that when I was checking the voltage test leads they start at a normal voltage and then slowly go back down to zero. This is with the y-main hooked up and the x-main unplugged.

[awyatt2]

Re: 2011 Samsung 51" Plasma clicking no power on - some progress made

there is a number on the board you go by to ensure compatibility, most start with bn find the number on your board and post it then someone might be able to cross it if another one would work. the rev. letter at the end i.e. bn044237 rev. a usually the revisions are interchangeable. the main part number is usually not.

[tom66]

Re: 2011 Samsung 51" Plasma clicking no power on - some progress made

You must be careful to avoid getting the 720p X-main for this 1080p set. AFAIK they are not compatible although it may be possible to convert one into the other by swapping some parts.

[scotty562]

Re: 2011 Samsung 51" Plasma clicking no power on - some progress made

This is a close up of the x-main where you can read the model info.
http://i.imgur.com/Naxwchd.jpg

It says:
MODEL NO: 50'DH/DF_XM
PCB NO: LJ41-09422A
REV NO: R1.3(11/06/20)

PBA NO: LJ92-01759A HD
LJ92-01763A FHD

There is a barcode that reads TB 764B A2 19M3PJ - BA2.

Before I do order this do you guys think I'm on the right path? Should I replace the y-main as well just in case that's what took out the x-main or isn't that a big concern?

Edit:
I found one that is identical to mine for $25 with the buffer board so that's on the way.

[scotty562]

Re: 2011 Samsung 51" Plasma clicking no power on - some progress made

Thoughts anyone?

[scotty562]

Re: 2011 Samsung 51" Plasma clicking no power on - some progress made

The x-main will be here today. Today is my last chance to decide to get the y-main or not.