"EDP_PANEL_PWR_OR_PSR_EN --- 3v"
This requires at least LCD_PSR_EN, or EDP_PANEL_PWR to be present; both reported as missing by you.
Try to understand that we need accurate and consistent information.
If your measurment values change from post to post, difficult to help.
Remember to always check with internal LCD connected!
EDP_BKLT_PWM comes from PCH.
It is PWM signal, but you should get 2V DC approx, in working state.
No backlight possible with 0V; check diode mode to ground there.
Try doing PRAM reset 2-3 times.
Did you try known good compatible LCD assembly?
This requires at least LCD_PSR_EN, or EDP_PANEL_PWR to be present; both reported as missing by you.
Try to understand that we need accurate and consistent information.
If your measurment values change from post to post, difficult to help.
Remember to always check with internal LCD connected!
EDP_BKLT_PWM comes from PCH.
It is PWM signal, but you should get 2V DC approx, in working state.
No backlight possible with 0V; check diode mode to ground there.
Try doing PRAM reset 2-3 times.
Did you try known good compatible LCD assembly?