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

[lotas]

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.

[bohaboha]

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

[Diah]

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??

[bohaboha]

[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

[Diah]

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

[bohaboha]

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