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Samsung UE70TU6905 BACKLIGHTS AND SOUND ON NO PICTURES BUT SCREEN NOT DARK

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  • bohaboha
    replied
    Originally posted by Diah View Post

    if this was only the dry pasta when you try to remove heatsink caused BGA on the SoC. , no other choice now just refllow , apply weight load on the Soc at the middle and use yours heat gun over all rand and middle. good luck
    yes i it is .it hapen that i have this IRDA SMD And BGA Rework Station T-862++ i am thinking to use to just reflow the chip but i believe i will need a good liquid flux that i do not have it now to help the situation if you know wish one i should take ? i have already solder paste 01 but i think a liquid one will be better
    Attached Files

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  • Diah
    replied
    Originally posted by bohaboha View Post
    nothing special just try t take away the black heatsink that was a bit hard to do
    if this was only the dry pasta when you try to remove heatsink caused BGA on the SoC. , no other choice now just refllow , apply weight load on the Soc at the middle and use yours heat gun over all rand and middle. good luck

    Leave a comment:


  • bohaboha
    replied
    [QUOTE=Diah;n3547547]stack on STBY , this is different status as the Title you stared the threat.... what did you done wrong to make the set didn't start??[/QUOTE

    nothing special just try t take away the black heatsink that was a bit hard to do

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  • Diah
    replied
    stack on STBY , this is different status as the Title you stared the threat.... what did you done wrong to make the set didn't start??

    Leave a comment:


  • bohaboha
    replied
    Originally posted by lotas View Post

    There is nothing complicated here, they are here, install a jumper between them and disconnect the U-shaped cables on the panel strips one by one...
    Doing this test suggested by apokalipto to activate pmic voltages shorting trdy1&3 test points did not change anything in tv behaviour always stack on STBY and nothing happens on screen
    here some pics mainboard without heatsink i do not find datasheet of this SDP19405
    Attached Files

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  • lotas
    replied
    Originally posted by bohaboha View Post

    i do not understand why there is 180v and 190v on the cold side of the power supply
    This is power for backlighting, it cannot be 12v.

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  • bohaboha
    replied
    Originally posted by Diah View Post
    did you got the screen displaying image ??? so you are asking on service menu code !!!
    No Diah nothing displayed. yes am asking because none of the code is working it seems the TV freeze on STBY
    however the 12v,3.3v and 5 volt are present on the Tcon part of the board and that 5v you wanted on pin 7 is there on pin 12 instead of pin 7 but no 3.v on the lvds
    i do not understand why there is 180v and 190v on the cold side of the power supply
    Last edited by bohaboha; 01-12-2025, 06:02 PM.

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  • Diah
    replied
    did you got the screen displaying image ??? so you are asking on service menu code !!!

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  • bohaboha
    replied
    Originally posted by lotas View Post

    There is nothing complicated here, they are here, install a jumper between them and disconnect the U-shaped cables on the panel strips one by one...
    thank you so much lotas my eyes need to be renewed please do you have an idea why I am not able to reach Service Menue ? have tried with several codes but there might be something for this series very grateful if you can refer

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  • lotas
    replied
    Originally posted by bohaboha View Post

    thank you i ll try if i find those test points quite difficult to se any inscription
    There is nothing complicated here, they are here, install a jumper between them and disconnect the U-shaped cables on the panel strips one by one...
    Attached Files

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  • bohaboha
    replied
    Originally posted by apokalipto View Post
    You can activate pmic voltages shorting trdy1&3 test points, for this test you must disconnect lvds cable.
    thank you i ll try if i find those test points quite difficult to se any inscription

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  • apokalipto
    replied
    Originally posted by bohaboha View Post

    I have tried several codes there must be a specific code for this series of Samsung
    You can activate pmic voltages shorting trdy1&3 test points, for this test you must disconnect lvds cable.

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  • Diah
    replied
    Originally posted by bohaboha View Post

    I have tried several codes there must be a specific code for this series of Samsung
    they are all the same over this shit samy..... yours T.CON on boards didn't start and the issue at Dc DC converter

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  • bohaboha
    replied
    Originally posted by Diah View Post
    if it response to RC then try my post 54 56 ..... and check the LVDS socket which pin have 3.3V
    I have tried several codes there must be a specific code for this series of Samsung
    Last edited by bohaboha; 01-11-2025, 01:42 PM.

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  • Diah
    replied
    if it response to RC then try my post 54 56 ..... and check the LVDS socket which pin have 3.3V

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  • bohaboha
    replied
    Originally posted by Diah View Post
    check yours RC if it blink with yours mobile camera... easy method.. here are the diagram of the socket

    Click image for larger version  Name:	IR-WIFI-BT.jpg Views:	0 Size:	170.7 KB ID:	3545135
    When I press on on the RC STBY goes out and returns directly in the same position as if it can't start the TV so the RC works.
    I have managed to get rid of the black heatsink.
    thanks for the chart but it's not exactly the same because on my kontact pin 6,16,19 and 20 are free(not used) plus I only have a start button
    Last edited by bohaboha; 01-10-2025, 07:40 AM.

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  • bohaboha
    replied
    Originally posted by Diah View Post
    check the RC with mobile camera
    The RC is responding

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  • Diah
    replied
    check the RC with mobile camera

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  • Diah
    replied
    Originally posted by bohaboha View Post

    on lvds 3 and 4 have 0.4v 0.8v
    Pin 7 seems to be short but there is 3.353 on1 and 3.15 on pin 4 then i have 5.191 on pin 12 3.381 on pin 13 then 3..313 on pin15
    3.3V will generate one time only it used also by TV RC of the wifi / BT module... as well the IR so any one have short will kill this rail

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  • bohaboha
    replied
    Originally posted by Diah View Post
    PIn 7 at STB 5V ... LVDS 3 ,4 3.3V when Tv on

    Click image for larger version Name:	20250105_132135.jpg Views:	0 Size:	1.37 MB ID:	3545110
    on lvds 3 and 4 have 0.4v 0.8v
    Pin 7 seems to be short but there is 3.353 on1 and 3.15 on pin 4 then i have 5.191 on pin 12 3.381 on pin 13 then 3..313 on pin15

    Leave a comment:

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