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While it had battery power, the mac would turn on, but it wouldn't recognize the charger. I have 20v, the board starts to boot, pulls it down to 0.6v and restarts. I discovered PP1V8_UPC_XA_LDOD reading 3v on the UB300. I changed it, but the problem remains. But only when the charger is in its...

Good file, it worked. But I needed to change my recorder because of the 128 chip model.

I had already changed it, but I changed it again. Nothing changed!

I've already tested it with two original 45w. Both don't work. I don't have a fake to test. I tested two original MagSafe 85w on another Air working 100%, PPDCIN hit 16.5v too. This board is difficult! =/

customer turned off the imac while updating the firmware in the macOs update. Do you have the bios file? Another problem, my recorder does not read the chip model (MX25L12873L). Do you have any to recommend?

the 45w drops more every day! now it stays at 2v and keeps going down

PPDCIN_G3H with 16.5v. The 45w MagSafe no longer works.

Follow voltages. Without battery and with magsafe 85w 1 - 0 2 - 16v 3 - 4.2v 9 - 0 12 - 3.4v 13 - 3v 14 - 3v 15 - 0 17 - 8.5v 19 - 5v 20 - 5v 27 - 16.5v

Situation got worse. Now it only turns on without a battery. I tested with 85w and now I have a problem with 45w, without LED and low PPDCIN. Q7010 - without battery and with magsafe 45w 1 - 15v 4 - 6.7v 5 - 15v U7100 - is there any point in measuring without battery power?

The strange thing is that only the original 45w magsafe does this R7180 - 100k R7181 - 62k R7185 - 470k R7186 - 332k

I discovered that the voltage drops more. it ended up with 2v. But only when the battery is connected. I measured directly on the J7000. I replaced the R/D7012 and Q7010 to test, same problem. I tested the charger without the q7010, the PPDCIN on the j7000 had a stable 15v with the battery...

I've already tested it with two original 45w chargers, same problem! I tested the chargers on other Macs, they worked! they are 100%

Original 45w with battery, problem. Original 85w with battery, works normally. I have no fake source! I used the bench source, it works normally.

goes down to 7.7v. But PPBus follows 8.1v (with battery)

The problem only happens with the board, dc and battery. I noticed that the entire PPDCIN_G3H line drops the voltage, it drops even when connected to the 45w charger. I replaced the Q7180, but it didn't solve the problem. It looks like a leaky component. But I can't find it.

Without battery with 45w PPBus - 8.56v PP3V42 - 3.42v With 45w battery PPBus - 8.16v PP3V42 - 3.42v With 85w battery PPBus - 8.26v PP3V42 - 3.42v I ran the ASD without the battery, it gave an error in the battery sensors Sensor - Temperature (TBOT) -- Battery Thermal Diode 0 (test 1) Sensor -...

pins 17.18 - 4.4ohms, 27.28 - 21ohms In diagnostic mode, the only error that appears is that there is no battery. Does this model still have ASD?

Another crazy detail. Without the battery, the 45w charger has an LED and turns on the board. Tried changing the battery, same problem.

The problem returned. I thought something was crazy. It doesn't recognize just MagSafe 45w. I tested it with two different and original chargers, it doesn't charge the battery and doesn't even light the LED. When I put the MagSafe 85w (original), it charges the battery and lights up. I replaced...

I changed the U8070 twice more and it worked. I'm taking it out of scrap, because I don't have it new.