Samsung "MU" series (UN, UA, UExxMUxxxx) fault dump IC1604 25Q40...

[lotas]

Thank you, lotas, but it didn't help.
This is my home TV. When it broke, I took it to a service center. They diagnosed it as a broken processor.
I repair other electronics and am not an expert in TVs, but this seemed strange to me. So I decided to try it myself.

In 25q40, I found that the firmware start was missing and searching the forums suggested that this was a common problem. But fixing this problem resulted in the standby voltage appearing, the TV started to turn on, but there was no image.
Scratches on 25Q80 indicate that they tried to flash it without unsoldering it. This makes me think that I will have to further improve my skills in TV repair.

What is the motherboard number BN94-xxxxx, and what is the panel number CYxxxxxx?

If the TV was already at the service center, then it is possible that the 25Q40 already had a non-original dump, maybe they tried to program it without saving the original one..

[Beard dwarf]

Try.

Thank you, lotas, but it didn't help.
This is my home TV. When it broke, I took it to a service center. They diagnosed it as a broken processor.
I repair other electronics and am not an expert in TVs, but this seemed strange to me. So I decided to try it myself.

In 25q40, I found that the firmware start was missing and searching the forums suggested that this was a common problem. But fixing this problem resulted in the standby voltage appearing, the TV started to turn on, but there was no image.
Scratches on 25Q80 indicate that they tried to flash it without unsoldering it. This makes me think that I will have to further improve my skills in TV repair.

[lotas]

SAMSUNG UE40MU6402
There is no standby mode. I tried to fix the firmware myself, the standby mode appeared, but when I turn on the image there is no. Maybe I did it wrong.
Can anyone help?

Try.

[Beard dwarf]

SAMSUNG UE40MU6402
There is no standby mode. I tried to fix the firmware myself, the standby mode appeared, but when I turn on the image there is no. Maybe I did it wrong.
Can anyone help?

[Mr.Pc]

If you are looking for a new motherboard, look for the number on the white paper tag, it is BN-94-xxxxx, so that there are fewer compatibility problems with your panel.

I haven't made the purchase yet, but I'm grateful once again for this important tip.

[lotas]

Since then you've helped me until now, so it wasn't a lack of help. I'm going to try to buy another motherboard. Have a good day!

If you are looking for a new motherboard, look for the number on the white paper tag, it is BN-94-xxxxx, so that there are fewer compatibility problems with your panel.

[Mr.Pc]

Since then you've helped me until now, so it wasn't a lack of help. I'm going to try to buy another motherboard. Have a good day!

[lotas]

I don't know how else to help you...

[Mr.Pc]

Something may be shorting on this bus, what resistance on this bus is not low, maybe an inductor (turn-to-turn short circuit). eeprom 24 series does not have a status register.

Hello! I replaced the inductor and it was back to normal. I believe that when I went to remove it I heated it too much and it must have ruined it. On the 24c the LED was blinking the same way. I did both with your dump and mine again.

[lotas]

Something may be shorting on this bus, what resistance on this bus is not low, maybe an inductor (turn-to-turn short circuit). eeprom 24 series does not have a status register.

[Mr.Pc]

First erase the chip, then program the bin file, maybe after your experiments this eeprom is damaged, try without it, the power will not rise to 3.3v, is the chip soldered correctly?

Got it! The 24c is soldered correctly. I turned on the board without it and the regulator still gets quite hot, so I removed the inductor and it doesn't heat up anymore, but I believe that something really happened in these tests because when I put the inductor in, both the regulator and the inductor start to heat up again. I'm going to change the inductor tomorrow to see what happens because I don't have equipment to measure inductance. Regarding deleting the 24c, when I open the recorder program, the option to delete it becomes unavailable, so I can only load the .bin file and program.

[lotas]

First erase the chip, then program the bin file, maybe after your experiments this eeprom is damaged, try without it, the power will not rise to 3.3v, is the chip soldered correctly?

[Mr.Pc]

Yes, it is damaged, try recording a dump on it, the one I posted here on 24C512.

I made the recording, but it didn't work. Now the LED no longer blinks, the regulator that was previously oscillating between 2.5v and 3.3v is now between 1.12v and 1.11v and getting very hot. I took the 24c off again and put the old software on, but it persisted the same way. To program the 24c, just load the .bin and click on program, right?

[Mr.Pc]

Yes, it is damaged, try recording a dump on it, the one I posted here on 24C512.

Right! I'll do it now and I'll be back here to tell you.

[lotas]

Forgiveness! It was my lack of attention . I managed to read it now.

Yes, it is damaged, try recording a dump on it, the one I posted here on 24C512.

[Mr.Pc]

Yes, why do you always have 25, it should be 24, I wrote above that you need to write 24C512, or is the number “4” button on your keyboard not working?

Forgiveness! It was my lack of attention . I managed to read it now.

[lotas]

I had already done this, but another error occurred. (check id error) So as I didn't know what it was, I was afraid to continue.

Yes, why do you always have 25, it should be 24, I wrote above that you need to write 24C512, or is the number “4” button on your keyboard not working?

[Mr.Pc]

Why do you choose "Auto 25...", this is not the 25th series (spi flash). and 24 series (eeprom), you need to manually enter 24C512 and press "Select".

I had already done this, but another error occurred. (check id error) So as I didn't know what it was, I was afraid to continue.

[lotas]

I can yes!

Why do you choose "Auto 25...", this is not the 25th series (spi flash). and 24 series (eeprom), you need to manually enter 24C512 and press "Select".

[Mr.Pc]

And how do you read it, like an eeprom or like a spi flash 25q40, you can post a photo of the eeprom itself and the programmer log, what it writes.

I can yes!