SONY KDL-43W755C | 5 blinks stand-by LED

[dominik0801]

Work on MB reflow it

Okay, tomorrow I'll do it. Wanted to do a full reball, but don't want to wait for a stencil.

[lotas]

What reball? First, check the I²C bus (SDA, SCL) between the T-CON (eeprom) and the motherboard, what is the resistance on this bus relative to ground, use an oscilloscope to check whether data is being exchanged on it...

[dominik0801]

What reball? First, check the I²C bus (SDA, SCL) between the T-CON (eeprom) and the motherboard, what is the resistance on this bus relative to ground, use an oscilloscope to check whether data is being exchanged on it...

Relative to eachother: 100ohm both.
Relative to ground: 4.6KOhm both.
They are not shorted to eachother.

Unfortunately scoping and BGA has to wait too, I forgot about the holidays and family time.. 😆

[Diah]

What reball? First, check the I²C bus (SDA, SCL) between the T-CON (eeprom) and the motherboard, what is the resistance on this bus relative to ground, use an oscilloscope to check whether data is being exchanged on it...

nomoresonny point it to EMMC. but its not... but BGA on vision Chips 100%

[Diah]

just to add . you need to be sure too of the Opto..C between Hot and Cold area are all fine

[lotas]

And also check the area where the eeprom was missing, maybe before you, when the eeprom was dismantled, the resistors were removed or damaged, compare with the original board and use a multimeter to call these lines (sda, scl) from this eeprom chip through the lvds cable to the motherboard to see if they reach.

[Diah]

Hello guys.

Today I got this TV for free, the friend included a "new" (used) TCON with it, since he told me, that doesn't work either.
With the stock TCON, this TV turns on, stays on, but the screen only has 5 RED vertical lines on it, and that's it.
Backlight stays on and is fine.

With the "new" TCON, the TV turns on, shows SONY logo, some spinning circles, then the TV goes blank, and the stand-by LED is blinking 5 times, won't react to anything.
I have read some forums, where it's been told that the part number is not always enough to be the same, because TCONs might still have different components on them - but they are all the same, triple-checked everything under a microscope.
I have switched all NAND/SPI chips over, in case they have an identification number in them, but that didn't help either.
No missing components.

While the TV is ON (before it turns off with 5 blinks), the picture on the screen is perfect. Not a single bad pixel, line, or whatever.
Unplugging different sides of the screen won't make a difference either.

Do you have any ideas?

hold om.... i just read yours first post..... you need to do all test i wrote before on yours original t-con

[lotas]

Relative to eachother: 100ohm both.
Relative to ground: 4.6KOhm both.
They are not shorted to eachother.

Unfortunately scoping and BGA has to wait too, I forgot about the holidays and family time.. 😆

But 100 Ohm between sda and scl seems low to me, check which side (t-con or motherboard), you need to disconnect the lvds cable.

[nomoresonys]

Not so sure, I have seen faulty eMMC present in many ways.

[nomoresonys]

There's a test to narrow between emmc and "vision chips" anyone know it?

[lotas]

"Vision" is a Processor that is installed in Philips TV models.

[nomoresonys]

"Vision" is a Processor that is installed in Philips TV models.

It's a word that Diah used BUT we all know what he meant, the processor of course, get it iotus. or do you want to keep up with the BS nonsense. CLIMB DOWN.

[nomoresonys]

Mods, don't you think you need to censor all smartass remarks, not just mine. Don't give a shit regardless.

[lotas]

Vision - it gets very hot, which was not even saved by the original radiator and because of this, the BGA balls on which the processor was soldered degraded. After a reboot and installation of a more powerful radiator + installation of a fan, the motherboard continued to live.

[nomoresonys]

I also don't care for the new cookie policy, about how this site shares info and also said something about may not even be based in the U.S.A. So where is this site based?? If it is based in the States then why did I read this cookie policy here on this site??

[Diah]

Vision - it gets very hot, which was not even saved by the original radiator and because of this, the BGA balls on which the processor was soldered degraded. After a reboot and installation of a more powerful radiator + installation of a fan, the motherboard continued to live.

exactly... also i can add the poor quality manufacture... when they set the controller camera in wrong way or at more tolerance at time it checking the board after placing the pasta on it... so how it come become this as General issue !!!

[Admin]

I also don't care for the new cookie policy, about how this site shares info and also said something about may not even be based in the U.S.A. So where is this site based?? If it is based in the States then why did I read this cookie policy here on this site??

Hi nomoresonys, thank you for your contributions to the forum. I see you're very active on here so all your contributions are appreciated. On "censoring smartass comments"... I would say that occasional smartass comments without vulgarity are fine and not an issue. If a member frequently makes them it can lead to a negative environment and that becomes a problem. I want everyone to keep things helpful and positive. I'm new to the forum so I'm not saying this directly to you but just as a general rule. I've not even looked at your post history just generalizing here.

On the cookie policy. The site has servers in Europe and in USA but with such strict privacy laws (especially in Europe) you need to be clear on your policies to cover yourself. We actually don't sell or share user data. We just have a cookie policy, privacy policy, and terms that cover us in all scenarios to avoid frivolous claims.

With user generated content there are some risks you have to negate.

[nomoresonys]

Hi nomoresonys, thank you for your contributions to the forum. I see you're very active on here so all your contributions are appreciated. On "censoring smartass comments"... I would say that occasional smartass comments without vulgarity are fine and not an issue. If a member frequently makes them it can lead to a negative environment and that becomes a problem. I want everyone to keep things helpful and positive. I'm new to the forum so I'm not saying this directly to you but just as a general rule. I've not even looked at your post history just generalizing here.

On the cookie policy. The site has servers in Europe and in USA but with such strict privacy laws (especially in Europe) you need to be clear on your policies to cover yourself. We actually don't sell or share user data. We just have a cookie policy, privacy policy, and terms that cover us in all scenarios to avoid frivolous claims.

With user generated content there are some risks you have to negate.

Welcome and thanks for the non-abusive and detailed response, imo I already think you are the best admin. that I have ever seen here. here is what it says after cookies are erased and the site is brought up fresh: We process personal data about users of our site, through the use of cookies and other technologies, to deliver our services, personalize advertising, and to analyze site activity. We may share certain information about our users with our advertising and analytics partners. For additional details, refer to our Privacy Policy.

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