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

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lotas

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Join Date: Jan 2016

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Country: Russia
#161

12-25-2024, 09:00 AM

Originally posted by 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?

Try.
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UE40MU6402 orig_fix.rar (62.5 KB, 3 views)
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Beard dwarf

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#162

12-29-2024, 11:14 AM

Originally posted by lotas

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.
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lotas

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Country: Russia
#163

12-29-2024, 11:55 AM

Originally posted by Beard dwarf

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..

Last edited by lotas; 12-29-2024, 12:02 PM.
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Beard dwarf

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#164

12-29-2024, 04:24 PM

Originally posted by lotas

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..

BN94-12398F
CY-KK040HGNV2H

If this is not the original dump, then why is it also corrupted? I hope this is the original. Maybe you're right.
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lotas

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#165

12-29-2024, 04:43 PM

Originally posted by Beard dwarf

If this is not the original dump, then why is it also corrupted? I hope this is the original. Maybe you're right.

A working Dump is damaged immediately after power is applied, if the status register (0x88, 0x42) is not set after writing; if the service center did not do this, then it is damaged again.
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lotas

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#166

12-29-2024, 05:23 PM

Try these dumps for t-con (25q80).
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25q80.rar (45.5 KB, 4 views)
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Beard dwarf

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#167

12-30-2024, 01:08 PM

Originally posted by lotas

Try these dumps for t-con (25q80).

Big thanks for help, everything works. Happy New Year!
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lotas

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#168

12-30-2024, 01:42 PM

Originally posted by Beard dwarf

Big thanks for help, everything works. Happy New Year!

Ok! Happy New Year!
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srdi

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#169

02-07-2025, 03:53 AM

Телевізор не включається, немає режиму очікування! SAMSUNG UE55MU6172

The TV does not turn on, there is no standby mode! SAMSUNG UE55MU6172
Attached Files
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BN94- 12486N 25q40.rar (62.2 KB, 5 views)

Last edited by SMDFlea; 02-07-2025, 11:31 AM. Reason: english
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DJJaro

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#170

02-08-2025, 09:29 AM

Hello. I have broken IC1604 from board BN94-12432B.Dump from this threed not working. Is possible fix? Thank you.
Edit: solved, must be changed status register. Board working OK, thank you.
Attached Files
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W25Q40CL_BN94-12432B.rar (58.8 KB, 6 views)

Last edited by DJJaro; 02-08-2025, 09:53 AM.
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David Rocha

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#171

03-06-2025, 04:12 PM

Hello! My TV is a Samsung UN43MU6100G from board BN94-12431J, CODE: BN41-02568B.Dump from this! Could you help me a fix this problem? This TV in standby stay blinking and not turn on!
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bkp tv.zip (69.0 KB, 4 views)
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lotas

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#172

03-06-2025, 07:12 PM

Originally posted by David Rocha

Hello! My TV is a Samsung UN43MU6100G from board BN94-12431J, CODE: BN41-02568B.Dump from this! Could you help me a fix this problem? This TV in standby stay blinking and not turn on!

Your dump is fine, it works, the problem is different.
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ducky29

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#173

03-10-2025, 01:29 PM

Hello Iotas. Can you please check this dump? UE43NU7022K. Thank you!
Attached Files
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GD25Q40@SOP8-200_20250308_164837.zip (25.2 KB, 5 views)
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lotas

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#174

03-10-2025, 01:40 PM

Originally posted by ducky29

Hello Iotas. Can you please check this dump? UE43NU7022K. Thank you!

Hi, try the working dump.
Attached Files
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SAMSUNG UE43NU7022K(NU7090)-43-500_GD25Q40.rar (23.7 KB, 9 views)
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ducky29

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#175

03-10-2025, 02:44 PM

Originally posted by lotas

Hi, try the working dump.

Thanks Iotas. It works fine!
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lotas

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#176

03-10-2025, 02:50 PM

Originally posted by ducky29

Thanks Iotas. It works fine!

Ok!
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yureyko

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Join Date: Oct 2024

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Country: Ukraine
#177

03-15-2025, 06:12 AM

Greetings friends,

i have a Samsung TV UE40MU6402U with board BN41-02568b
The problem is that i have no standby
I thint that maybe the problem is software related since i have voltages in board.
I read the IC1604 (W25Q40CL)
Propably problem is the IC1604 but i read all of them.
If someone knows or have software to help please you are welcome.

Thanks in advance for your time and your help.
Attached Files
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IC1604_W25Q40CL.rar (62.7 KB, 7 views)
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lotas

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Join Date: Jan 2016

Posts: 4861

Country: Russia
#178

03-15-2025, 06:56 AM

Originally posted by yureyko

Greetings friends,

i have a Samsung TV UE40MU6402U with board BN41-02568b
The problem is that i have no standby
I thint that maybe the problem is software related since i have voltages in board.
I read the IC1604 (W25Q40CL)
Propably problem is the IC1604 but i read all of them.
If someone knows or have software to help please you are welcome.

Thanks in advance for your time and your help.

Your dump is working, the problem is different...
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SMDFlea

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Join Date: Jan 2018

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Country: UK
#179

03-15-2025, 04:28 PM

The thread title has been renamed to Samsung "MU" series (UN, UA, UExxMUxxxx) fault dump IC1604 25Q40...

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yureyko

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Join Date: Oct 2024

Posts: 12

Country: Ukraine
#180

03-16-2025, 04:47 AM

Originally posted by lotas

Your dump is working, the problem is different...

Interesting...
All voltages are present, but the indicator does not light up.
However, when I try to flash the SPI with a working firmware from a similar model, the indicator lights up, but there is no startup...
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UN65MU6300FXZC, no standby LED but power supply good. Bad IC1604 25Q40?

by Yanleb

Hi all,

My UN65MU6300FXZC is dead and the standby LED stays off. The power supply is good. The main board is BN94-12434A.

Disconnecting the main board from the power supply makes the backlight come ON.

I did disconnect the panel cables and the WIFI modules, the board is still dead.

I did read in many posts that IC1604 25Q40 becomes corrupted. It has proper 3.3 volt on VCC pin 8. I did read that if I post its dump here someone can fix it. Is that right?

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Then motherboard connected, standby led is on and current consuption is 18W.
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Maybe the firmware in the IC SPI Flash W25Q40CL (IC1604) is corrupted.

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