For $29/mo, we provide access to advanced level technicians who will answer your questions on any Macbook board related matter to the best of their knowledge promptly & walk you through how to solve your problem so you can deliver a working board to your customer.
The MacBook is detected in target disk mode, I assume that the ssd must be good otherwise they wouldn't even show it to me, the only thing is that I can't do the installation in recovery because it crashes and restarts, the recovery in dfu mode stops without showing errors, honestly I don't know...
I tried to restore the dfu, it completes the operation without displaying errors but entering the recovery and trying to install the system it restarts and returns to the question mark
I have this MacBook that has a question mark at startup as if there was no operating system I enter the recovery but if I start the installation freezes and restarts if I try to enter the disk utility it crashes and restarts at the question mark, where should I start?
I have this card blocked at 5v 0.20A-0.25A PPBUS =10v unstable 3v8 aon =3.7 stable I don't get 3.3 LDO the liquid damage affects the MagSafe side, I solved a short on the ic that manages the audio jack 3v8 aon in diode mode and 0.56
So, after checking all the resistors around UG400, I found RG012 at 74k instead of 100, I replaced the resistor and now I get PPDCIN, trying to put F5201 and F5200 back together by connecting MAGSAFE on usbc related to UG400, it goes into continuous on off, PP3v8_AON turns on and off, same...
On C5250 I have no voltage, this only if powered by the relative USB port UG400,
Instead if I feed from the USB port related to UF400/500 I get 12.25 on C5250.
On UG400 I have the following situation: PP3v3_UPC2_LDO 3.4v PP1v5_UPC2_LDO_core 1.5v
PPVBUS_USBC2 5v
PPDCIN_aon 0v
I have no voltage this only if I power from ug400
while from while from UF400/500 I get 12.25,
on UG400 I get PP3v3_UPC2_LDO PP1v5_UPC2_LDO_core
PPVBUS_USBC2 5v PPDCIN_aon 0v
I brought everything back to the initial situation, they were UF015 and UF115 which were not in good condition, then I replaced UG260 taken from the donor board and now the USBC port relating to UG400 is stable on 5v and 0.003 PPBUS and at 1.5 and I don't have the 3v8 AON
Yes I put them in the same position I compared the readings ldo the diode mode with a working card and it's regular, I even reassembled the replaced cd3217 on another card and it works normally
I tried to replace all cd3217 with a good board but now all the usbc ports turn on and off, before only UG400 did it, 3V8 AON IN DIODE MODE AND 0.160 LDO OBVIOUSLY TURN ON AND OFF