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

[Mr.Pc]

What is the panel number? CY-GK065HGNVBH ?

Hello Lotas! Sorry for the delay, but it was due to the time. I picked up the TV again and saw the panel number: CY-GK065HGNV5G

[lotas]

What is written on the paper is BN94-12811S. Model: BN41-02568 - Code: BN41-02568B is printed on the motherboard. If you want I can take a photo of everything

What is the panel number? CY-GK065HGNVBH ?

[Mr.Pc]

What model, panel number, I want to check 25Q80 if I find a dump, and what is the motherboard number BN94-xxxxx?, it is written on a paper sticker on the motherboard.

What is written on the paper is BN94-12811S. Model: BN41-02568 - Code: BN41-02568B is printed on the motherboard. If you want I can take a photo of everything

[lotas]

What model, panel number, I want to check 25Q80 if I find a dump, and what is the motherboard number BN94-xxxxx?, it is written on a paper sticker on the motherboard.

[Mr.Pc]

How many times does the standby LED blink between pauses?

It blinks non-stop, without pause, there is no error code. Measuring the voltage on the main PCB connector, the power supply oscillates between 11.5v and 9v. I did the test without the 25q40 and the voltage stabilizes at 9.5v. When I disconnect the power supply cable, the panel LEDs light up normally and the source voltage stabilizes at 12.65v.
I did the test with a bench source too, I injected 12v into the main PCB and there is very low consumption and it goes back to zero, this keeps looping

[lotas]

How many times does the standby LED blink between pauses?

[Mr.Pc]

One at a time, and you will see which half of the panel is not working, if the problem is in the panel.

I made the jumper and tested one side at a time, but it still didn't work. In any case, I am grateful for your dedication.

[lotas]

So I make a jumper between the two, connect the LVDS cables and turn on the TV?

One at a time, and you will see which half of the panel is not working, if the problem is in the panel.

[Mr.Pc]

These ones.

So I make a jumper between the two, connect the LVDS cables and turn on the TV?

[lotas]

These ones.

[Mr.Pc]

Post a high-quality photo in the area of the lvds connectors.

I managed to find the points you mentioned, but I don't know how to identify them like that on the PCB. My camera isn't the best, but I believe I can see it. I marked a red dot in each place. I also want to thank you for your time and attention.

[lotas]

Not yet because I don't know how to identify these points. What I did was disconnect the lvds cables and turn on the TV without them. 😅

Post a high-quality photo in the area of the lvds connectors.

[Mr.Pc]

Did you place a jumper on the motherboard between contacts FB_TRDY_1 and FB_TRDY_3 (feedback)?

Not yet because I don't know how to identify these points. What I did was disconnect the lvds cables and turn on the TV without them. 😅

[lotas]

I disconnected the lvds cables

Did you place a jumper on the motherboard between contacts FB_TRDY_1 and FB_TRDY_3 (feedback)?

[Mr.Pc]

There is a negative voltage (VGL) on the T-CON, so one inductor should be connected to ground with one terminal, to convert the negative voltage relative to the ground, rather this is this inductor, check how it is connected.

I have already checked your connection and everything is normal considering this negative voltage. I've already checked the USB and HDMI and there is no short. I also checked two mosfets that are in the connector that comes from the power supply and there are no shorts, which is why I was doubting the 25q40.

[lotas]

I disconnected the lvds cables and it remains the same. I noticed that when I plug in the power supply, the voltage fluctuates as if there was a short on the main board. I found an inductor L406_UT on the main board that has a very low resistance of 0.04ohms. I don't have the schematics so I don't know if it's right.

There is a negative voltage (VGL) on the T-CON, so one inductor should be connected to ground with one terminal, to convert the negative voltage relative to the ground, rather this is this inductor, check how it is connected.

[Mr.Pc]

25Q40 is working, have you disconnected the lvds cable from the motherboard? (in this case how TV behaves)

I disconnected the lvds cables and it remains the same. I noticed that when I plug in the power supply, the voltage fluctuates as if there was a short on the main board. I found an inductor L406_UT on the main board that has a very low resistance of 0.04ohms. I don't have the schematics so I don't know if it's right.

[lotas]

Hey guys! I also have my Samsung TV UN65MU6100G whith main pcb model/code: BN41-02568B and power supply: BN44-00808D which is not turning on and only has the standby LED blinking. I opened the TV and did some tests with the source board and the LEDs light up and the voltage is stable. It has two eproms and I believe the problem is in one of them. Could anyone help me with this, I extracted the file from both. Thank you in advance for everyone's attention!

25Q40 is working, have you disconnected the lvds cable from the motherboard? (in this case how TV behaves)

[Mr.Pc]

Hey guys! I also have my Samsung TV UN65MU6100G whith main pcb model/code: BN41-02568B and power supply: BN44-00808D which is not turning on and only has the standby LED blinking. I opened the TV and did some tests with the source board and the LEDs light up and the voltage is stable. It has two eproms and I believe the problem is in one of them. Could anyone help me with this, I extracted the file from both. Thank you in advance for everyone's attention!

[Me_you_them]

Maybe I found the problem...
I noticed that the component indicated in the photo it's no longer there, probably has blown out during the desoldering of the chip.
Is there any solution?