macbook a1932 no screen , no backlight

[defdjamel]

hi there , in this A1932 - Air 13 Retina 2018 820-01521, there no screen , no backlight.
no liquid damage.
i have change the lcd flex ,
tested with a working lcd screen but no display , no backlight.
hdmi over usbc is ok .laptop is working .
the same.
here measurement

• PP3V3_LCD = 3,3 V
• PP5V_LCD = 5 V
• I2C_SDA_TCON / I2C_SCL_TCON = 3,3 V (no oscilation)
• LCD_PWR_EN = 5 V
• LCDBKLT_EN_L = 12 V
• EDP_BKLT_EN = 0 V
• IPD_LID_OPEN = 1.8 V

i am stuck, if you have an idea....

[mon2]

• LCDBKLT_EN_L = 12 V
• EDP_BKLT_EN = 0 V

Should be:

• LCDBKLT_EN_L = 0v (active low signal)
• EDP_BKLT_EN = logic high = '1' to enable (active high signal)