Hello all,
I bought this MacBook brand new at launch. I have taken care of it since new and it suddenly failed on me recently.. it began to refuse to charge.
I first checked all the basic things before opening it, to no avail.
I have now opened it and taken the logic board out. I did a visual inspection and found no visible liquid damage or corrosion, or exploded caps, burnt components, etc. Cleaned the usb c connectors.
Here are my measurements thus far:
PBBUS_AON: 12V
PP5V_S2: 5.3V
PP3v8_AON: 3.8V (at L5800, L5820, or L5840)
PP3v3_S2: 3.3V at LC710
PP5v_S2: 5V at LC320
PPDCIN_AON_CHGR_R: 5V (at C5205,5204,5203,5202,5201,5206) with both ports)
PP3V3_UPC1_LDO (Near CD3217 chips): 3.4V
PP3V3_UPC1_Core (Near CD3217 chips): 3.4V
PPVBUS_USBC: 5V (if connected to the corresponding port. Only shows 5V per side if connected, other side will show 0v)
I'm stumped. I've reviewed:
https://repair.wiki/w/MacBook_Pro_A2...w_at_5V_repair
https://repair.wiki/w/MacBook_Pro_A2...a_at_5V_repair
Followed all steps (except for Check for DFU or Recovery Mode, and PP1v25_S2:, unable to reach lead with probe) and still haven't found the issue. Haven't found shorts.
Please help any way you can, I appreciate any input. Thank you!!
I bought this MacBook brand new at launch. I have taken care of it since new and it suddenly failed on me recently.. it began to refuse to charge.
I first checked all the basic things before opening it, to no avail.
I have now opened it and taken the logic board out. I did a visual inspection and found no visible liquid damage or corrosion, or exploded caps, burnt components, etc. Cleaned the usb c connectors.
Here are my measurements thus far:
PBBUS_AON: 12V
PP5V_S2: 5.3V
PP3v8_AON: 3.8V (at L5800, L5820, or L5840)
PP3v3_S2: 3.3V at LC710
PP5v_S2: 5V at LC320
PPDCIN_AON_CHGR_R: 5V (at C5205,5204,5203,5202,5201,5206) with both ports)
PP3V3_UPC1_LDO (Near CD3217 chips): 3.4V
PP3V3_UPC1_Core (Near CD3217 chips): 3.4V
PPVBUS_USBC: 5V (if connected to the corresponding port. Only shows 5V per side if connected, other side will show 0v)
I'm stumped. I've reviewed:
https://repair.wiki/w/MacBook_Pro_A2...w_at_5V_repair
https://repair.wiki/w/MacBook_Pro_A2...a_at_5V_repair
Followed all steps (except for Check for DFU or Recovery Mode, and PP1v25_S2:, unable to reach lead with probe) and still haven't found the issue. Haven't found shorts.
Please help any way you can, I appreciate any input. Thank you!!
Comment