Like the title says, Initially the device didn’t have image, turned it was a backlight connector problem. I shone light into the LCD there was clear image, only dark
After soldering new BL connector, the backlight works perfectly. Here is the big F up. During plugging lcd connector, I bent some pins unknowingly.
Put it back together, turned it on, surprised, backlight is on but there is no image now. Well, sort off. I i see carefully there is faint image resembling normal one, but only on right part on the screen albeit really hard to make it out.
Sadly I don’t have another lcd nor board to test. Is there a way to find out whether the damage is on motherboard side (power circuit, lvds, etc ) or LCD has given up it’s ghost ?