Model :Macbook A1464
mb: 820-00165
History:
It came complete dead. Was full of dust and corroded near Spi rom area. Cleaned thoroughly with IPA, removed eeprom chip and restored tracks,resistors as per schemtic. U6101 was also heavily corroded and i've restored it properly. Observed under microscope, rest of the mb seems clean.
It worked like a charm after all these steps, delivered it to customer, it came back again dead but this time magsafe light turns green/orange and it does switches with pulses. I've powered it with dc supply using 45W magsafe2 original cable. The current consumption varies from 0.018ma to 350ma with frequent pulses.
I've again checked the mb under microscope and everything seems fine. These are the rail measurements:
PPBUS_G3H:8.6V
PPBUS_S5_HS_COMPUTING_ISNS: 8.6V
PPBUS_S5_HS_OTHER_ISNS: 8.6V
PPDCIN_G3H_ISOL:14.8V
PP3V42G3H:3.44V
PPVRTC_G3H:3.32V
PP5V_S5:5.03V
PP3V3_SUS:3.3V
PP3V3_S5:3.3V
All the above rails are stable.
These rails are pulsing:
PP5V_S4RS3: PULSING BETWEEN 0.0 TO 2.99V
PP5V_S0:PULSING BETWEEN 0.0 TO 0.45V
PP3V3_S4:PULSING BETWEEN 0.0 TO 1.36V
PP3V3_S3: PULSING BETWEEN 0.0 TO 1.75V
PP3V3_SO:PULSING BETWEEN 0.0 TO 1.52V
PP3V3_S4SW_SNS:PULSING BETWEEN 0.0 TO 3.0V
Known good bios flashed with clean me on a new same model chip, Lio board and connector tested fine with another working a1464.
Need help friends.
mb: 820-00165
History:
It came complete dead. Was full of dust and corroded near Spi rom area. Cleaned thoroughly with IPA, removed eeprom chip and restored tracks,resistors as per schemtic. U6101 was also heavily corroded and i've restored it properly. Observed under microscope, rest of the mb seems clean.
It worked like a charm after all these steps, delivered it to customer, it came back again dead but this time magsafe light turns green/orange and it does switches with pulses. I've powered it with dc supply using 45W magsafe2 original cable. The current consumption varies from 0.018ma to 350ma with frequent pulses.
I've again checked the mb under microscope and everything seems fine. These are the rail measurements:
PPBUS_G3H:8.6V
PPBUS_S5_HS_COMPUTING_ISNS: 8.6V
PPBUS_S5_HS_OTHER_ISNS: 8.6V
PPDCIN_G3H_ISOL:14.8V
PP3V42G3H:3.44V
PPVRTC_G3H:3.32V
PP5V_S5:5.03V
PP3V3_SUS:3.3V
PP3V3_S5:3.3V
All the above rails are stable.
These rails are pulsing:
PP5V_S4RS3: PULSING BETWEEN 0.0 TO 2.99V
PP5V_S0:PULSING BETWEEN 0.0 TO 0.45V
PP3V3_S4:PULSING BETWEEN 0.0 TO 1.36V
PP3V3_S3: PULSING BETWEEN 0.0 TO 1.75V
PP3V3_SO:PULSING BETWEEN 0.0 TO 1.52V
PP3V3_S4SW_SNS:PULSING BETWEEN 0.0 TO 3.0V
Known good bios flashed with clean me on a new same model chip, Lio board and connector tested fine with another working a1464.
Need help friends.
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