LCD backlight not working after screen change

Hello Guys,

I have a Sony Xperia Z4 Tablet, Model: SGP771. After changing a cracked screen, with a brand new original Sony screen, the screen work but it doesn't light up. I mean it shows information and the touch sensor works, but the LCD light is not working.

I tried two different screens, and i get the same problem.

Any idea or suggestion with it?

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Did you disconnect the battery before removing any screen connectors?

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yes of course

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Did the old screen worm before you did this repair? Also is there any missing components or damage near the screen connectors.

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the old screen worked, the lcd light worked, but after changing it, even the old screen is not lighting up anymore. the connectors and pins look ok, and the cable as well is transmiting since i checked.

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Was this ever solve?. I am now having the same issue.

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Deck the Halls
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2 Answers

Hey all i got the same Problem and i tried a new flat cable it also the same did u got any idea?

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What IF I didnt disconnect The battery?

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