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yesterday i did some DFU reset attempts, i noticed that during the reset attempts the current draw was about 1.8 amps. Could it mean anything?

thanks for the information, I don't have a chip programmer, I would like to buy one, even for newer macbooks, which programmer do you suggest? At the moment the macbook seems to be doing very well, very fast start-up, fans under control, perfect battery !!

solved, I bought a bios chip already programmed, it worked for a day, I got one from another logic board and now everything works !! I don't know if the terminal command "sudo nvram AutoBoot =% 00" may have created some problem with the bios chip.

PPBUS_G3H 13v 3V3_G3H 3,4v

this macbook had had liquid damage, i replaced trackpad connector, i also changed efi chip, battery was dead and put in a new one. Today I connected the battery without fixing with double sided tape, I switched it on and everything went smoothly. Before turning off I deactivated autoboot with a...

what will it be that triggers this instability? unfortunately my skills are not that advanced .... I'm stalled

the weird thing is that when I first charged it it seemed to have the right amps draw. I tried to restore DFU. What can I do now? an ultrasonic wash? Trying to inject tension at some point? Throw it all away in the trash? I was hoping it might still have a chance to work .... I had seen a post...

I got bogged down .... I don't know how to continue

this is a big problem ...... I really don't know where to find it, any other suggestions? do i try to change u7701?

Pin 12 5,1v Pin 6 2,8v to 3,1v oscillating and unstable Pin 16 0v Pin 17 0v

also P1V2_SW is not present, I checked at pin 13 of the U7701 and it seems to be in short circuit, in diode mode it has a value of 0.07. I don't know if this voltage is needed for booting, is that correct?

Ho notato una strana fluttuazione di tensione ai poli dell'L7030, passa da 4v, poi a quasi 12v, scende a 10v poi a 8v e riparte

yes 0V9_SSD present and stable

in the afternoon I will do further tests, looking in the forum I saw that another user "macRepairAmb" had the same problem, but the post seems to be interrupted, by chance do you know if it solved? macRepairAmb post

I'm sorry I'm making a mess, will pay more attention to the answers. going back to the coil measurements I checked these: L8102 0.06 L7030 0.43 L7701 0.08 L8410 0.78 LB700 0.26 L7660 0.40

all those in the cpu and gpu area are short-circuited

here are two photos of the measures. as soon as the PPBUS_G3H charger is connected it goes to 12.70v but be careful, with the charger and battery connected it stays at 20 volts for a second, then it drops to 5v but PPBUS_G3H remains stable at 12.40v.

also the voltage on r3460 is now fixed at 0.8v

I bought on EBay, unfortunately I don't know the history of this macbook, I just know that it should be the version with i9 cpu, 32gb ram and 1tb hard disk. the voltages are stable