[FONT=Calibri]Hello,[/FONT]
[FONT=Calibri]I am currently working on a Macbook Pro [B]A1990 [/B](motherboard [B]820-01041[/B]) which is not charging.[/FONT]
[FONT=Calibri]The Macbook consumes 5V and 0.019A at USB-C. There seems to be a partial [B]short-circuit[/B] on the [B]PPBUS_G3H [/B]rail as I have 0V on this rail.[/FONT]

[FONT=Calibri]I've physically separated (by removing F7000 and F7001) PPBUS_G3H and the ISL9240 charging chip to see which side the short is coming from. Removing these fuses gives me 12.6V at the output of the ISL chip (PPVBAT_G3H_CHGR_REG).[/FONT]...

Hi,

I hope this is the correct place to post about this device. I originally posted regarding this on iFixit so see the details from that post below:

"I'm hoping someone can give their opinion on the symptoms I'm seeing before I spend any more time and put money into this. I got this MacBook from a customer and after looking at it they decided they didn't want it.

It doesn't turn on and there's no visual signs of life. I have tried resetting the NVRAM, SMC, power cycling, unplugging the battery, using the charger with the battery unplugged. Removed the...

[FONT=Verdana]Hello everyone.[/FONT]

[FONT=Verdana]I have recently obtained a MacBook Pro A1989 model with a touch bar and Apple ID. Unfortunately, it does not want to start up.[/FONT]

[FONT=Verdana]No CPU Voltage.[/FONT]
[FONT=Verdana]U7800 Does produce voltages.[/FONT]
[FONT=Verdana]T2 Chip warming up very very little.[/FONT]

[FONT=Verdana]I do have voltages like 1.8, 0.9, 3.3, 2.5 volts, etc., present. I did not find any short circuits. Unfortunately, the device has no touch ID/start button. So, I have used the debug jumper to put the device...