SAMSUNG UE55MU6405 - no standby

[totof]

Hi i have Samsung UE55MU6405

The tv will not turn on, there is no standby light.
Main board BN41-02568B (BN94-11958Q)
Screen CY-KM055HGAV3H

When i remove the psu cable to main board i get backlight

1,8V and 3,3V on main board

Attached my dump file from 25Q40

Can someone send me the right file please?

[lotas]

Re: SAMSUNG UE55MU6405 - no standby

Hi i have Samsung UE55MU6405

The tv will not turn on, there is no standby light.
Main board BN41-02568B (BN94-11958Q)
Screen CY-KM055HGAV3H

When i remove the psu cable to main board i get backlight

Attached my dump file from 25Q40

Can someone send me the right file please?

Try.

[totof]

Re: SAMSUNG UE55MU6405 - no standby

lotas! I love you!

It work very fine

By the way dump for 25Q80 and eeprom 24512 for this tv reference.

[lotas]

Re: SAMSUNG UE55MU6405 - no standby

Ok!

[KYBOSH]

Re: SAMSUNG UE55MU6405 - no standby

How common are problems with these memory chips?

[Joistyk11@gmail.com]

Re: SAMSUNG UE55MU6405 - no standby

Hi I Have The Same TV With The Same Issue. can you please explain how to use this file? Thank you.

[totof]

Re: SAMSUNG UE55MU6405 - no standby

Hi I Have The Same TV With The Same Issue. can you please explain how to use this file? Thank you.

Hi.
You need to use a flash programmer, like CH341A programmer. You will find the procedure to use it on bacaps or other sites on internet.

[lagri]

Re: SAMSUNG UE55MU6405 - no standby

UE55mu6405u with the same problem, can you help me?
Thanks in advance.

[lotas]

Re: SAMSUNG UE55MU6405 - no standby

UE55mu6405u with the same problem, can you help me?
Thanks in advance.

Yes I can. Try.

[lagri]

Re: SAMSUNG UE55MU6405 - no standby

You are the best ! works great ! thank you very much!

[lotas]

Re: SAMSUNG UE55MU6405 - no standby

You are the best ! works great ! thank you very much!

OK. Thank you.

[yoritomo]

Re: SAMSUNG UE55MU6405 - no standby

Hello

Same problem with UE55MU6225WXXN , I could not find the dump for the eeprom IC1604 anywhere, please anyone can find it ?

Thanks you very much

[lotas]

Re: SAMSUNG UE55MU6405 - no standby

Hello

Same problem with UE55MU6225WXXN , I could not find the dump for the eeprom IC1604 anywhere, please anyone can find it ?

Thanks you very much

Post your non-working one here and I'll fix it.

[yoritomo]

Re: SAMSUNG UE55MU6405 - no standby

Thank you for the reply

This is mine, may I ask what are you modifying ?

[lotas]

Re: SAMSUNG UE55MU6405 - no standby

Thank you for the reply

This is mine, may I ask what are you modifying ?

From the damaged dump I make it work. try.

[yoritomo]

Re: SAMSUNG UE55MU6405 - no standby

Thanks for the dump, but looks like something else is wrong, still be no reaction from the stand by LED, the processor keeps cold as well as RAM chips, no POWER_ON signal going to the power supply, I could find 1.8V on the power button, and 3.3V is coming to the IR module.

I don't know which is the vital power supply in stand by mode on this motherboard.
Pins 1,7 and 8 are powered with 3.4V at IC1604


Anyone as a clue ? As usual with Samsung no schematics for this board ....

[lotas]

Re: SAMSUNG UE55MU6405 - no standby

After writing the dump, you need to set and write the status register 0x88, 0x42, without them the firmware flies again.

[yoritomo]

Re: SAMSUNG UE55MU6405 - no standby

Wow thank you so much, now it is working fine, I did not know it needs to be protected, is it sometime the case for Nand chips too ? Because I failed them always ...

[lotas]

Re: SAMSUNG UE55MU6405 - no standby

Nand suffers from Bad Block, ECC and if firmware data falls into these (BB).

[yoritomo]

Re: SAMSUNG UE55MU6405 - no standby

Yes I know, but even from official spare parts providers I could never grab any correct Samsung Nand chips without any bad blocks, I tried to use the three method to override bad block, but no success ... with the same software as you showed for RT809H