Un55h6350afxza

[jkb242]

Re: UN556350AFAZA

Update following system board replacement

Unfortunately no change but pursuing a couple follow on checks and requesting clarification on an earlier diagnostic testing.

-When removing one of display ribbon connections at the T-Con board with the power board connected to the system board, then applying AC power, I reported seeing the backlights turn on while viewing the rear panel and seeing a very dim backlight, across the screen, barely noticeable viewing the front of the display. Should the backlights be fully turned on at this point? The same question also applies to the other test with the power board disconnected from the system board. Why do the backlights turn on with either one of the T-Con to display ribbons connected but not both? Also, should there not be a viewable message of “no input” displayed on at least 1/2 the screen? Assuming there were video sources connected to the system board?

With the replacement system board installed and both boards connected normally, I also noted when AC power is applied, the standby LED blinks 6 times and extinguishes. Could this be due to the EEPROM having lost its programming or possibly being corrupt?

Much thanks for additional input.

[jkb242]

Re: Un55h6350afxza

Lotas mention this site which I took as a reference location to see the board to which he referred in his explanation, you followed his post with a link containing the same vendor's name which I mistakenly took to appear as a recommendation. You obviously knew this vendor was not one to be recommended since you knew what complaints had been written.

Shame on me for not “catching” that link was to a warning but with everything in mind, you were careless not make this clear the link was to a warning. I'm not inferring you did this with intent to mislead but the seeing link alone was certainly not sufficient.

I admit I should have checked out the link to see it wasn't an endorsement. That was clearly my mistake. I have kept my comments direct and professional without personal insult. I don't believe that's too much to ask of you. Please see attached.

[nomoresonys]

Re: Un55h6350afxza

What are you smoking PAL? I didn't post a link to that site, Lotus did, before you start running your BIG MOUTH, try reading something when posted.

[jkb242]

Re: Un55h6350afxza

Great info thanks. I suppose the board number you recommended was one that is more universal for this series and will accept the appropriate programming or paring with the exact TV configuration in which it would be installed. How is this done exactly, further reading you could suggest. I've ordered the exact replacement and trust no mod to the configuration is required.

I did unknowingly purchase from a vendor who has been found by others here to be less than honest but the link was provide this thread with no warning! and Since I was requesting a source I took this as a link to a good vendor, naturally. . I just hope I'm lucky. I used PayPal so I would have “some” leverage in the event I encounter any issues. Bummer!

My response to member nomoresonys was not intended to suggest you (Lotas) posted the link but somehow, my response to nomoresonys was directed to you which was not my intention. Very sorry that reply was apparently sent to you as it was not my intention to do so since you did not post that single link to this vendor.

[jkb242]

Re: Un55h6350afxza

You can order a board with a smaller or larger diagonal size, let's say "50" and then change it to your panel in service mode, then look for the number BN41-02157B, the main thing is that the connector matches yours (LVDS), and that it matches your region.

Great info thanks. I suppose the board number you recommended was one that is more universal for this series and will accept the appropriate programming or paring with the exact TV configuration in which it would be installed. How is this done exactly, further reading you could suggest. I've ordered the exact replacement and trust no mod to the configuration is required.

I did unknowingly purchase from a vendor who has been found by others here to be less than honest but the link was provide this thread with no warning! and Since I was requesting a source I took this as a link to a good vendor, naturally. . I just hope I'm lucky. I used PayPal so I would have “some” leverage in the event I encounter any issues. Bummer!

[lotas]

Re: Un55h6350afxza

I just saw the link you posted to my thread. I thought it was a recommendation as a source which I had requested, but then I read the reviews today after I ordered.

WHY WOULD YOU POST A LINK TO A SOURCE TO ANOTHER MEMBER LOOKING FOR A SOURCE WITHOUT STATING A WARNING DONT GO THERE?

If you did this intentionally I'm shocked that a member here would do this to another unsuspecting member.

I don't know anything about this site, I typed in the search and went to this site, so that you can see which numbers you need to pay attention to, and not order from this site.

[jkb242]

Re: Un55h6350afxza

https://www.badcaps.net/forum/showth...t=tvpartstoday

I just saw the link you posted to my thread. I thought it was a recommendation as a source which I had requested, but then I read the reviews today after I ordered.

WHY WOULD YOU POST A LINK TO A SOURCE TO ANOTHER MEMBER LOOKING FOR A SOURCE WITHOUT STATING A WARNING DONT GO THERE?

If you did this intentionally I'm shocked that a member here would do this to another unsuspecting member.

[lotas]

Re: Un55h6350afxza

You can order a board with a smaller or larger diagonal size, let's say "50" and then change it to your panel in service mode, then look for the number BN41-02157B, the main thing is that the connector matches yours (LVDS), and that it matches your region.

[jkb242]

Re: Un55h6350afxza

I did not mean to order from this site, I showed what part numbers should be for finding and ordering a motherboard.

I was seeking assistance for a source as well since I haven't found any listed on Shop Jimmy or other providers I have used before. I just want to be sure that a replacement board would not require programming as I am unable to do this. Please advise. Thanks

[jkb242]

Re: Un55h6350afxza

You don't have to look for the motherboard if there is a programmer, then you need to read the data (dumps) from 25Q40 and 24C512, and if the software fails in them, then you can restore it.

Are you saying this could be a programming issue that would not be addressed by a replacement board? If so I need to know ASAP as I do not have a programmer or reader. Do any of the replacement boards require programming?

Thanks again!

[jkb242]

Re: Un55h6350afxza

Your number must be BN94-07845B, BN97-08043A
https://www.tvpartstoday.com/BN94-07...n94-07845b.htm

Thanks indeed for the assistance. The board model number on the sticker shows the exact board for this set to be BN-07259E which was in stock at the supplier recommended. I appreciate being told about this source as I was unaware of them. I ordered the exact board and agree that the sys board would seem to be the culprit given no other more classical failures. Much thanks will provide feedback when board is replaced.

Thanks again for the assistance!

[lotas]

Re: Un55h6350afxza

You don’t have to look for the motherboard if there is a programmer, then you need to read the data (dumps) from 25Q40 and 24C512, and if the software fails in them, then you can restore it.

[nomoresonys]

Re: Un55h6350afxza

I'll take your word for it, I did not research it.

[lotas]

Re: Un55h6350afxza

It does not matter.

[nomoresonys]

Re: Un55h6350afxza

That board is for ver. UH02, his ver. is UH01, part number is different.

[lotas]

Re: Un55h6350afxza

I did not mean to order from this site, I showed what part numbers should be for finding and ordering a motherboard.

[nomoresonys]

Re: Un55h6350afxza

https://www.badcaps.net/forum/showth...t=tvpartstoday

[lotas]

Re: Un55h6350afxza

Your number must be BN94-07845B, BN97-08043A
https://www.tvpartstoday.com/BN94-07...n94-07845b.htm

[jkb242]

Re: Un55h6350afxza

Sorry I omitted the picture I referenced….

[jkb242]

Re: Un55h6350afxza

I think the problem is the mainboard isn't sending backlight on signal, which was my first thought. Sometimes a simple little test might lead down a different path, it's troubleshooting, assumption is not always good.

I agree entirely in creating certain tests to further define the actual issue. One thing I also noticed after reconnecting the T-Con and with everything back to normal is that when pushing the set power on button, the standby LED blinks 5 times then extinguishes and does not repeat this cycle until the set is unplugged allowed to sit, then the same action could be duplicated. Not sure this offers any real insight. I would asked if there is anyway to apply a constant DC voltage to the BL PWM pin that would mimic the pulse “on duration” equal to approximate mid backlight drive just to get the backlights on. Purely a troubleshooting measure. What's your thoughts regarding this and an idea of the DC bias to use.

Please see the attached picture of the system board noting the numerous board ID numbers. The one listed on the white label and the other one sulked screened on the board circled in red. I've searched EBay for the number on the label but replacement boards that are returned as being available do not match that of the board label of my set. Shop Jimmy has nothing available and appears to now sell everything on E Bay. This board is only 9 years old and well within what is traditionally available from Shop Jimmy I believe. Any sources you could recommend?

Thanks!