hgoncalves
Active member
Hi,
I have an A2179 820-01958-A with no backlight.
Already tried known good display, without success.
It has external image, and i can see the apple logo on the internal display (very dark).
PP3V3_G3SSW_SNS = 3.3V
ISNS_LCDBKLT_N = 12.59V
ISNS_LCDBKLT_P = 12.59V
PP5V_G3S = 5.1V
PPVIN_S0SW_LCDBKLT = 12.59V
PP5V_S0_BKLT_A = 5.1V
PP5V_S0_BKLT_D = 5.1V
EDP_BKLT_EN = 3.3V
BKLT_EN_R = 3.3V
PPVOUT_S0_LCDBKLT = 54V
ISNS_LCDBKLT_IOUT = 0V
My schematic is very wrong, and where it should have R5629 it is no stuff, but PMU_LCDBKLT_ISENSE= 0V (on R5628)
Can you help?
I have an A2179 820-01958-A with no backlight.
Already tried known good display, without success.
It has external image, and i can see the apple logo on the internal display (very dark).
PP3V3_G3SSW_SNS = 3.3V
ISNS_LCDBKLT_N = 12.59V
ISNS_LCDBKLT_P = 12.59V
PP5V_G3S = 5.1V
PPVIN_S0SW_LCDBKLT = 12.59V
PP5V_S0_BKLT_A = 5.1V
PP5V_S0_BKLT_D = 5.1V
EDP_BKLT_EN = 3.3V
BKLT_EN_R = 3.3V
PPVOUT_S0_LCDBKLT = 54V
ISNS_LCDBKLT_IOUT = 0V
My schematic is very wrong, and where it should have R5629 it is no stuff, but PMU_LCDBKLT_ISENSE= 0V (on R5628)
Can you help?
Last edited: