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Repair information for the Xiaomi Redmi Note 8T, a smartphone released in November 2019. This phone has model number M1908C3XG.

Why backlight lcd not working?

self back light is ok

ic backlight is ok

lcd is ok

but not working

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@alirezashahnazi you are not telling us how you know that all of those components are "ok". I would suggest that you check the backlight enable circuit as well as the coil for your backlight. For that you will need the schematics for main board.

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