Inspecting the screen, the right side of the screen has darkness. It is estimated that there is a problem in the right side connecting circuit of the backlight, which is also the connecting circuit of the fourth pin of the LCD connector.

Using the multimeter to inspect the value of resistance to ground of the capacitor C2018 with diode gear, the red pen connects the ground and the black pen tests the value, the value is normal and function is well.

If the left side of screen has uneven brightness problem, you can check the left side connecting circuit of the backlight, which is also the connecting circuit of the first pin of the LCD connector. Inspect the function of capacitor C2019 and inductor FL2026 and repair the damaged part of them.