820-00165 no screen backlight

[Soji]

Measurement with known good screen
PPVIN_S0_LCDBKLT_FET- 8.58v
PP5V_S0 on u7701 is present
PP3v3_s0 on u7701 is present
SMBUS_PCH_CLK IS 3.3v
SMBUS_PCH_DATA IS 3.4v
PPVIN_s0sw_LCDBKLT IS 5v
EDP_BKLT_PWM IS 3v
Measure all the resistor around backlight ic with a known good one, they are all intact. There is no back light

 

[2informaticos]

Is there image for sure, only missing backlight?
Did you check XW7720?

What about BKL_EN/PWM levels?
Just in case, check continuity to R5490.