No backlight display on my dell xps laptop

Hello,

can anyone tell me how to troubleshoot a bad LED display backlight problem.

I replaced my Dell xps 13 9333 display assembly and the new screen comes up but without a backlight display as shown in the picture below.

Can someone provide me with motherboard schematics for dad13cmbag0 or tell me with fuse or IC is responsible for powering the LED backlight of a Dell xps 13 9333.

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also can someone tell me the name of the connector circled in red as well as where i can get a replacement

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and

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