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LCD TVs - LED

Noblex 42ld877fi change eeprom followed image failure

Televisor NOBLEX 42ld877fi

Televisor NOBLEX 42ld877fi

Danielv
hace 5 años
hace 5 años
Good morning people, this is the third TV that I entered with the dead plate in the start logo, I replaced the main board with exactly the same one but for some reason the image was reversed and it was exaggeratedly out of its picture. Until there everything well, remove n50 and n56 which correspond to the memories of the old board and install them in the new board, the image returned to its original resolution with the data of the old board but with no less detail in the picture , at first glance it pixelates and it seems that it lacks colors, as if they were inverted. Take measurements, solve N56 but continue with the fault. Attached images, I hope you can enlighten me. Best regards.-
TobíasTv
TobíasTv
13.721
hace 5 años
hace 5 años
Hello Daniel, Welcome, I can enlighten you, I changed a main of a TV like yours, I put a main of a pioneer 55 with the same code, I only changed the eeprom, the screen was reversed but it was like yours, I tell you what I did, I looked very well with a magnifying glass around the lbds connector and I noticed that there is an array of dumpers and that in the two plates they were in a different position, remove the ones that did not go from the new plate and place the other plate those that were missing, eye, take pictures because it is very easy to lose yourself in which plate you are luck I greet you, Tobias
TobíasTv
TobíasTv
13.721
hace 5 años

if there are many and do not dare to see what is the pin vesa / jeida by downloading the datasheet from the t-con and starting there

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Danielv
hace 5 años

Hi TobiasTV, you gave me a great clue where to continue, I also noticed the same thing, the two boards are exactly the same model but the difference is that the one I got from replacement has a few extra components, it would be understandable if the board offered an extra function How to be the 3D function. I already put it under a magnifying glass. Thank you, friend!

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Pantrizte
hace 5 años

As the partner says, you have inverted the Vesa / Jeida pin. you have to look for the panel or tecom datasheet and in a datasheet it will show you the 31 or more pins and what function each one fulfills. or simply when you find the pin vesa / jeida, measure it with the tester and if it doesn't have 3.3v send it to ground. before doing that, unlink the main pin (from the flex that goes from the main to the tecom) or directly from the tecom.
Good luck and regards.

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Pantrizte
hace 5 años
hace 5 años
[b] Hi mate, I have an idea for your problem, 1: If the old board has a nandflash memory you should try placing it on the new board. And if you make the previous fault, put the new nandflash to your board and change the firmware. Luck and Greetings. [/B]
Danielv
hace 5 años

This is how Pantrizte is a colleague, it has already been replaced, both the eeprom and the nandflash (moved from the old main to the new one), same processor board itself, should have raised the system correctly. I already upload a photo with the replacement. I am analyzing the possibility of replacing the main again, but it is giving up very quickly, the solution may be in sight but my head is already exploding .. haha

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Danielv
hace 5 años

I tell you, the solution was to place the nandflash and the eeprom of the new board in the old one and I grab it without any obvious problem. since the firmware is not easy to get.

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