Hello, sorry mi English.
This is a 820-01521 MacBook Air that came not turning on whit 5v stuck. Connected the mac in DFU mode and apply a revive option but shows the 75 error . Now the usb meter register 20v but in DFU mode have the same issue.
In some YouTube video saw that maybe the issue was the SSD so i check the rails and only PP2V7_NAND seems low (2.5V)
PP3V3_G3H_RTC =3.3v
PPBUS_G3H = 12.56v
U8600/U8607
PP1V8_SSD = 1.8V
PP2V7_NAND = 2.5V (Seems low)
PP0V9_SSD = 0.9V
SSD0_S4E0_VPP = 2.1V
SSD0_S4E1_VPP = 2.1V
SSD0_RESET_L = 1.8V
SSD0_S4E0_PCI_AVDD_H = 1.8V
This is a 820-01521 MacBook Air that came not turning on whit 5v stuck. Connected the mac in DFU mode and apply a revive option but shows the 75 error . Now the usb meter register 20v but in DFU mode have the same issue.
In some YouTube video saw that maybe the issue was the SSD so i check the rails and only PP2V7_NAND seems low (2.5V)
PP3V3_G3H_RTC =3.3v
PPBUS_G3H = 12.56v
U8600/U8607
PP1V8_SSD = 1.8V
PP2V7_NAND = 2.5V (Seems low)
PP0V9_SSD = 0.9V
SSD0_S4E0_VPP = 2.1V
SSD0_S4E1_VPP = 2.1V
SSD0_RESET_L = 1.8V
SSD0_S4E0_PCI_AVDD_H = 1.8V