PHILIPS 75PUS7805/12 BLACK SCREEN

[bohaboha]

Hi all this set power on and the ambient lamps lite but the screen is black and no sound i tried Samsung way to test backlight but it did not work i did also try to power of and hold power for some times nothing happened
on power supply big capacitor :394v on tcon the 12v and 3,3v even on Mainboard

[ShaunRutherford]

Check the cables from the mainboard to the T-Con and from the T-Con to the panel carefully, making sure they are not loose or broken.

[bohaboha]

ok i ll do a sherlocks investigation on them thank you