iPhone screen right side backlight dark

Hello, I just replace my iphone 6 plus screen. Following the step by step YouTube video after I turned on my phone, I find that the right side of the screen is darker than the left side especially on the top right. I attached a photo on how it looks. I've disassemble and assemble the screen before with my old screen but it never happens before. Can someone help me to see is it the screen issue or I did something wrong? Thanks a lot for your help.

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Push the LCD ribbon cable in more (of course not too much or you will be left with a ribbon connector stuck into the logic board when you remove it). Sometimes it is not pushed in enough and causes this.

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Maybe the display backlight is uneven

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Test the old display, to rule that out

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If a new screen does not solve your problem, then you probably have a damaged backlight circuit. This may have happened by mis-aligning the FPC connector and causing a short through the circuit.

Specifically, check FL2025/FL2026 or the backlight driver IC (U1502).

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Cathode Emi filter bead needs replacing

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Ha people don't even understand that this is the right answer!

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i have soltuion u asking for right side lcd dim light

1st u see home key or lcd jack

the lcd jack right side on tope side

A light filter( the hiding filter) on

home key jack slite le near u remove

filter and short or jumper by soldring iron

and ur prob is solved

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