Un50mu6070 Mainboard issue

[petersor]

OK lotas . . . Try this one.

[petersor]

Oops. OK. I'll reinstall that one and pull IC1604 . . .

[lotas]

Finally figured out how to use the CH341A and the NeoProgrammer software (I think). Here's the dump from the 25Q80DV. Can one of you take a look at it to see if it's corrupted and repairable? lotas maybe? I'd appreciate it. This is my first experience with eeprom reading (and hopefully writing). Not as bad as I thought it would be so far.

Rich

25Q80DV is a dump from T-con, and you need to read the dump from IC1604 (25Q40CL).

[petersor]

Finally figured out how to use the CH341A and the NeoProgrammer software (I think). Here's the dump from the 25Q80DV. Can one of you take a look at it to see if it's corrupted and repairable? lotas maybe? I'd appreciate it. This is my first experience with eeprom reading (and hopefully writing). Not as bad as I thought it would be so far.

Rich

[petersor]

I have one of these UN50MU6070 TVs that's bricked but mine is the AA14 version with main board BN94-12747R. Power supply is outputting correct voltages and the backlights come on when the main board is disconnected. I'll do some tests by removing the LVDS cable to rule out the panel and driver boards, and will try freezing the eeprom but it's looking like a software issue. I have a CH341A on order and should get it next week. When I do I'll post a copy of the bin file I pull from the IC. Anything else you can recommend that I do while I wait for the programmer? One other question - is it better to remove the IC to program it or just read/write it while installed?

Rich

[lotas]

Hi this file could repair my samsung TV UN55MU6300GXZS with motherboard code: BN41-02568B. LABEL BN97-12961X.
Thank you very much for sharing it. grateful for life.

If the problem is in the firmware, then you need to restore the native dump, and if you do not save the native dump and write down someone else’s, then there is a high probability that you will have to look for a working motherboard.

[edu98.exe]

Re: Un50mu6070 Mainboard issue

@Iotas. Can you please check my dump? I think its ok but just want to make sure.

Thanks in advance.

Hi this file could repair my samsung TV UN55MU6300GXZS with motherboard code: BN41-02568B. LABEL BN97-12961X.
Thank you very much for sharing it. grateful for life.

[lotas]

Re: Un50mu6070 Mainboard issue

A strange malfunction, and no one has repaired it before you, maybe someone else's dump was already in it. If you flash eMMC, then you need to flash the whole kit (spi, eeprom, emmc).

[ducky29]

Re: Un50mu6070 Mainboard issue

It will not work with someone else's dump 25q40, do you still have your native dump? And bring back your native dump eeprom 24c256 (if you saved it). And what was the original problem?

Original problem was 9v instead of 13v on the connector of mainboard. When disconnecting psu from mainboard the leds lit up. I posted my dump yesterday here https://www.badcaps.net/forum/showpo...&postcount=100

I kept the original untouched and I worked with spare dumps. With another 25Q40, on 2 times, I disconnected the cable between psu and mainboard, removed the 220v and then plugged back the cable between psu and mainboard and then put the 220v back on. 13V was stable, standby lit but it couldnt start up becouse the dump was not native. I tried to replicate it again this procedure with a native dump but I was unsuccesful.

[lotas]

Re: Un50mu6070 Mainboard issue

I have 9v on the connector instead of 12v. Psu is tested ok. On one case the standy led lit red,(new 25q40 with another dump) in other cases there is no standby. Already replace 24c256 just to make sure. Should i give it a try to the emmc? I have a dump for this chassis.

It will not work with someone else's dump 25q40, do you still have your native dump? And bring back your native dump eeprom 24c256 (if you saved it). And what was the original problem?

[ducky29]

Re: Un50mu6070 Mainboard issue

Hello, yes your dump is fine (working).

I have 9v on the connector instead of 12v. Psu is tested ok. On one case the standy led lit red,(new 25q40 with another dump) in other cases there is no standby. Already replace 24c256 just to make sure. Should i give it a try to the emmc? I have a dump for this chassis.

[lotas]

Re: Un50mu6070 Mainboard issue

@Iotas. Can you please check my dump? I think its ok but just want to make sure.

Thanks in advance.

Hello, yes your dump is fine (working).

[ducky29]

Re: Un50mu6070 Mainboard issue

@Iotas. Can you please check my dump? I think its ok but just want to make sure.

Thanks in advance.

[mtorres927]

Re: Un50mu6070 Mainboard issue

Can someone help with this eprom, My tv has no picture, model No UN50MU6070 ver DE09

I have attached the eprom dump. I'll appreciate any help given

[Techplayer]

Re: Un50mu6070 Mainboard issue

The screen is not blue, is dark grey or logically black...

Yes, you are right. But that is when the TV is off.

[Techplayer]

Re: Un50mu6070 Mainboard issue

by this you mean when you look thru the little holes on the back of the tv the backlights are blue?

No, the front display is all blue. I found some YouTube videos about that issue and they fixed it by changing the led's.

[nomoresonys]

Re: Un50mu6070 Mainboard issue

It's the original motherboard. I did check all the connections and everything is correctly inserted. Also I noticed when I disconnected the the cable from the power supply to the main board, it has the same behavior; backlight turns on but it's all blue. I will order a new set of backlights and I will post the result.

by this you mean when you look thru the little holes on the back of the tv the backlights are blue?

[Davi.p]

Re: Un50mu6070 Mainboard issue

The screen is not blue, is dark grey or logically black...

[Techplayer]

Re: Un50mu6070 Mainboard issue

It's the original motherboard. I did check all the connections and everything is correctly inserted. Also I noticed when I disconnected the the cable from the power supply to the main board, it has the same behavior; backlight turns on but it's all blue. I will order a new set of backlights and I will post the result.

[lotas]

Re: Un50mu6070 Mainboard issue

There was a problem in your firmware, I fixed it, is it your own motherboard or did you buy it from another TV?
Check all cables are correctly inserted, without distortions, do all this with the TV turned off.