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Attempted external switch with no change. After powering off the machine with PMU_ONOFF_L amperage drops to 0. Then pressing the DFU button for 3-5 seconds does nothing. I did measure to make the sure button press is connecting the 2 points and continuity shows it is. 0V on DFU_STATUS.

Here is the T2 under thermal imaging as it's plugged in. Draws 0.12-0.23 amps then drops to 0.040a

MacBook A2251 Brought in because the customer was not getting image for their machine anymore. Could hear sounds but no video. Another tech in my shop attempted a screen replacement. After the replacement the device no longer gives any power up sound or display still. Current State: Just the...

Have a MacBook A2141 that was brought in for not charging/no power on 820-01700 Looking at the board there were some signs of liquid damaged around U9080 - TPS62180 This was the only noticeable area, after ultrasonic cleaning the board didn't measure short in this area. All resistances...

Yes I played around with different things for 30 minutes without getting anywhere. I did take note it can be difficult but no matter what the machine was either off, or the CPU was heating up. I wasn't getting anywhere with it. Even attempted redoing the switch wires.

After forcing it to power off with the switch. It is still refusing to enter DFU mode. It just restarts at 0a and replicates what it's been doing of getting up to around 0.5a current draw and staying there. Regardless if I hold the DFU Force or not. I double checked soldering connections and all...

And that hot to the touch is through the cooler.

I double checked my soldering. I don't even get a response from the power button when holding it. The machine just stays at around 0.5A and doesn't drop. CPU just continues to get hot and fan tries to keep up but doesn't. After 20 seconds the CPU is very hot to the touch.

DFU doesn't work evening using a switch. Caps Lock has no reaction or light.

Have a Macbook A2179 that came in for not powering on properly. Customer stated it just stopped working and doing this. System doesn't appear to have any signs of liquid damage that can be noticed. With the battery disconnected, once plugged into power it boosts to 20V and draws around...

Okay that's what I suspected. Unfortunate :(

Working on a Macbook board that came in for no power. Stuck at 5V on USB-C Meter. No previous repairs or work done too the machine. Looking under the microscope I found PPBUS_G3H was shorted. Injected 1V @ 2A and noticed U9080 (ELC180) getting hot. Removed the IC PPBUS_G3H reads in the...

Known good BIOS was tested with no change in function/condition

I apologize. I wasn't aware of that fact at the time of posting. Will make sure all information is known next time.

Will try known good BIOS. Visual inspection shows no signs of mechanical damage. After observing the whole board under the microscope I was unable to see any damage to any components, even by screw holes. The machine worked for about a month with the new battery prior to this issue. I feel it...

System is not powering on. a battery replacement was done about a month ago. With the board alone on the bench the voltages are as follows PPBUS_G3H - 13.07V PP3V3_G3H 3.4v PP3V3_S5 - 3.34V PP3V0_G3H 3.08V PP5V_S5 - 5.12V PP5V_S4 - 5.12V PP5V_S0 - 5.13V L7210 Has 0V so CPUCore is missing...

I was able to get the machine booting again at least for now. However, with the board alone on the bench I was getting 20V. Now I'm stuck at 5V @ 0.4a. Additionally with the new battery connected I'm stuck at 5V @ 0.4-0.6a also but the machine is booting into the OS off the batteries charge...

I did not try with an external switch. I will reply after trying this

It does not get recognized that it is in DFU

History: Machine sustained severe liquid damage from a pet peeing on the machine. After opening it up, numerous signs of corrosion were noticed. The board was put through an ultrasonic cleaner and then checked again with just the board on the bench. No obvious shorts on the board PPBUS_G3H -...