Recent content by Djsp

In my case I solved it with a new battery, but the defect, I'm sure concerns the mosfets of the CPU, it seems the same defect of an A1398.

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...

In target mode it is not detected I don't think there is an operating system installed

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?

The readings around U8100 were normal, in the end I decided to replace it, the machine started working again

I noticed a temperature increase below U8100

Exact

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