Samsung TV mu6179 with Mainboard BN41-02568B wont save configuration.

[fixitforfree]

I have two Boards BN41-02568B for a UE55MU6179 of which one does produce a good picture (Board A) but can not save its configuration (even a factory reset will not work) and one board which produces a distorted picture (Board B). Learning from here the IC1604 saves the configuration of such a TV.

Before replacing the IC1604 from Board B to Board A - would that actually solve the problem from Board A not being able to store its configuration or could there be something else wrong with writing to the flashrom? Is it even the right chip to replace or should I look out for a different one?

Thank you very much in advance for your insight!

[Davi.p]

ic1604 is the standby software, it does not contain profile, the settings are stored in the emmc flash, the reason why it can't save is that probably the user partition is not more accessible due to FS error, the most sensed thing to try is to update the software but i do not think the procedure will touch the user partition... furthermore Samsung are protected by all type of serial port programming.. needs direct emmc programming..


PS: ...or you can crawl on the floor to Samsung asking for a repair update, i know they don't give to you

[lotas]

Move IC 1603 (W25Q80) from board A (where the image is good) to board B (where the image is bad), as I understand it, board B is not original, from another TV (donor) and with a different panel diagonal.

[Davi.p]

the boards comes from the same tv model? if yes can you post a photo of lcd panel internal sticker?

[fixitforfree]

Both boards are BN41-0286B and are both from a UE55MU6179.
The idea is to take the working IC from Board B (distorted pic) and move it to Board A. If the configuration is stored in the EMMC flash, then I would try to switch that IC. Which one would that be?

BTW: the board model seem to be used in a variety of different Samsung TVs. E.g. the same board is used in a UE49MU6279 (curved) and works in the UE55MU5179 chassis.

Davi.p: which sticker are you referring to?

[Davi.p]

I don't know how is and why the distorted picture, but if you are able to see the menus, and if the problem is the different panel, then you can try to enter the correct panel type in service menu, every lcd panel has a white sticker with the model, i need the photo

[lotas]

I don't know how is and why the distorted picture,

Because each motherboard had its own panel, from different manufacturers.

[Davi.p]

YES I UNDERSTAND, it's easy, but we don't know the real problems.. needs to know everything...

[lotas]

In the 3rd post I explained what needs to be done.

[Davi.p]

So when it has to be changed the service panel type setting?

[lotas]

I don’t see how bad the image is, maybe there’s nothing visible there and how you’ll change the panel in the service, stupidly, at random.

[fixitforfree]

@lotas: thank you for pointing out the differences of the boards which may explain why the image on board B is distorted. I have added a picture of board B (distorted). Please notice the panel itself shows three vertical lines which is a fault of the panel.
The distorted picture (board B) has an offset to the bottom and displays many more vertical lines
I did take over the service panel type from board A (which is the original board for that panel) and set it in board B without noticeable change.

I could try to move the resistor from position 3 (distorted) to position 1 - or would there be more differences between the two boards?
That would be easier than replacing an IC.
What I can tell: the working board from a curved mu6279 has its resistor at position 1 like board A.

@lotas: Could you explain why replacing the IC1603 in your post #3 would help getting rid of the distortion?

[lotas]

IC1603 (SPI Flash W25Q80) contains the T-CON firmware (all data and settings of your panel), rearranging that resistor will not give you anything.

Does this number match the number on your panel tag?

[Davi.p]

I had time to watch previous pictures only now, watching board A it has some signs of smoke filtered from back of board to the front by the 4 holes of heatsink, is there any burnt component on the back? As for what i remeber many emmc needs dual voltage to be able to both read & write, 3,3v is the basic Vcc and 1,8v is for writing, check around the DC DC converters, on these type of boards, you can easily check most of the choke inductors for DC DC output, plus there are maybe some linear DC DC (single chip converters like LM1117)

[lotas]

As for what i remeber many emmc needs dual voltage to be able to both read & write, 3,3v is the basic Vcc and 1,8v is for writing

Where did you get such knowledge, if you don't know, then don't mislead people.
eMMC has two power supplies, one for NAND memory (3.3v) and the second for the built-in controller (1.8 - 3.3v).

eMMC (embedded Multimedia Memory Card) is essentially a device where the interface controller is combined with flash memory (NAND design). In addition to the function of providing the interface, the controller independently corrects errors and manages bad blocks in NAND memory. Below, for understanding, is the internal simplified structure of eMMC.

[Davi.p]

Lotas if you are able to read what i say i used conditional, i'm not all day on the forum helping for free, i often check the forum in a hurry for the time i have, i cannot check every thing, since the conditional, user can check for datasheets, he is a technician and has got a computer.. don't put blame on me, if you think this is a professional service you are out of the road, i'm not paid for anything, users are free to get what they wants.. checking for a missing tension IS NOT A DAMAGE, unless you think otherwise... here there are users from different jobs, remeber this.. i don't want to repeat it again... the smoke is always a bell and needs to check.. (what a boring forum...!!)

[lotas]

This is not smoke on the board, but a coating, or the TV is in the kitchen or in a room where people smoke.

[Davi.p]

THis appears a tendency answer only to attack me.. so rest you only with the OP, i'm out for your happiness.. bye...

[lotas]

THis appears a tendency answer only to attack me.. so rest you only with the OP, i'm out for your happiness.. bye...

No one attacked you, I just suggested the correct answer.

[nomoresonys]

So why not try advice from post #3, if you do not have the ability to transfer the chip from original board to the new board, could take it to an electronics shop and have them do it for a few bucks.