Sony 49XH9505 four flash of death

[protonusr22]

Hello guys,
In the meantime I have tried an other quick and dirty trial for fixing this tv. Indeed, one of the backlight leds are gone. On the driver board there is an error detection pin that goes straight to the logic board. If I pull this line down to the ground (I assumed it is safe because it is an output of the led driver and it has a series resistor already on the board). Now the tv passes the self test and runs smooth without resets or any kind of glitch. Fortunately the defective led is on the bottom-left side of the screen and it is not visible during normal operation (eg. watching a movie or playing video games) so I have decided not to replace the backlight assembly because than I would risk breaking in half the LCD during removal.

Many thanks and I wish you all a great day,

[kasfamily]

Rational decision...

[protonusr22]

Rational decision...

?

[kasfamily]

You correctly decided not to disassemble the panel, the diagonal is large and if there is no experience, it can be damaged

[nomoresonys]

Some changing info here, you reported that you already tried grounding out the error wire but it did not work, are you saying you did it incorrectly the first time?

[nomoresonys]

Ok, I see, you did it right the second time.

[protonusr22]

Yes, first time i have tried the BL_ERR between the logic board and psu.