MacBook Pro 14" M1 Pro Battery related question.

[Stephen]

Voltage is 0 volts on L5230 on both points

[mon2]

Review the resistance across this DUAL mosfet @ Q5230.

So test the resistance between:

pin 1 of Q5230 = C5213 & L5230 (source / drain)
etc.

If you are comfortable with the idea, consider to flux and replace this dual mosfet. Assuming that U5200 is not defective, this inductor @ L5230 should show some voltage. This voltage then will pass onto Q5240 and finally to create PPBUS_AON.

[Stephen]

Review the resistance across this DUAL mosfet @ Q5230.

So test the resistance between:

pin 1 of Q5230 = C5213 & L5230 (source / drain)
etc.

If you are comfortable with the idea, consider to flux and replace this dual mosfet. Assuming that U5200 is not defective, this inductor @ L5230 should show some voltage. This voltage then will pass onto Q5240 and finally to create PPBUS_AON.

Question though, if the U5200 is not working wouldn't the board not turn on at all? Unless these boards are a little different, I would assume that U5200 could be the issue but the mosfet Q5230 was recently replaced as I assumed this was the issue but it still persisted, now what's weird is the misfit Q5240 is getting less voltage on PPDCIN_AON_CHGR_R that area is 3 volts and dropping but Q5230 has a consistent 5volts and not dropping.

[Stephen]

Review the resistance across this DUAL mosfet @ Q5230.

So test the resistance between:

pin 1 of Q5230 = C5213 & L5230 (source / drain)
etc.

If you are comfortable with the idea, consider to flux and replace this dual mosfet. Assuming that U5200 is not defective, this inductor @ L5230 should show some voltage. This voltage then will pass onto Q5240 and finally to create PPBUS_AON.

I am getting 24k ohms on pin 1

[Stephen]

I went ahead and replaced U5200 out of curiosity with the exact ISL9240HIB3 chip and same issue is around so U5200 is not the issue at this time...

[mon2]

That is a very low resistance for a mosfet. Suggest to flux & replace Q5230. As a comparison, check the same resistance of the replacement dual mosfet while it is out of circuit.

Update:

U5200 is probably ok but suspects are the 2 dual mosfets above linked to U5200.

[Stephen]

I remember replacing these but yet it still didn't solve the issue with a donor board, I will look for a donor that turns on and see if that solves the issue.

[Stephen]

replaced and issue is still persisting. I thought it was these as well but they were replaced from donor boards that work and it still doesn't fix this issue. I also replaced U5200 and that didn't solve the issue so I am still stuck on 0amps 5volts

[Stephen]

I believe L5230 is bad since it looks kind of weird and blown...

[mon2]

You have replaced both, Q5230 and Q5240?

What is the voltage to ground of the following?

PP1V8_S2

CHGR_AUX_DET

PPVBAT_AON

You have a charged battery attached to the laptop?

Update - replace L5230 if it is a suspect. The part is required.

[Stephen]

You have replaced both, Q5230 and Q5240?

What is the voltage to ground of the following?

PP1V8_S2

CHGR_AUX_DET

PPVBAT_AON

You have a charged battery attached to the laptop?

Update - replace L5230 if it is a suspect. The part is required.

Replaced L5230 nothing happened HOWEVER it was deformed and burnt and looked bad. I replaced it nothing fixed yet. I will read off other readings now...

PP1v8_S2 0 Volts
CHGR_AUX_DET 0 Volts
PPVBAT_AON 1.1volts and dropping

[Stephen]

no battery is not connected. It will turn on with battery connected.

[Stephen]

OMG the board just turned on......WTF its at 20volts...AND NOW its back at 5volts...

[mon2]

PP1v8_S2 0 Volts
CHGR_AUX_DET 0 Volts

Both are incorrect values and need to be non-zero. Test the resistance to ground of PP1v8_S2.

Measure the voltage to ground of R5215 (both legs). Is this resistor missing or defective?

TCRS noted that some boards need a good battery to power on - this may be one of them.

[Stephen]

Voltage Present on Pin 1 on R5215 No voltage present on Pin 2 which is CHGR AUX
Resistance to groundd on (PP1v8_S2) is 1.5k OHMS

[Stephen]

ok update I am getting 20volts and charing and not getting 0 amps anymore on the board with it connected to the battery! WOOHOO! Thanks MON2 you saved me and this customers computer. I will buy you a drink one day.

[Stephen]

Great one thing after another on this board...
so now guess what is at 190 degrees?! U8100 20volts is finally showing up at the board but now that area is super hot. Like its one thing after another lol

Also the CPU is getting hot as well, all shorts were removed and now that chip wants to act up. I am so done with this board lol

[mon2]

Test the resistance of R5215.

CPU will be hot when it is working. The CPU (regardless of make / brand) are current sucking pigs. Kind of like the salt eating pigs on (original) Star Trek except they would turn into mega babes (Nancy?) after eating the salt. The mega babes may have high blood pressure but were hot enough to be pursued by Captain Kirk (only).

Well here, the Apple or whatever crapware CPU is onboard, will heat up if without a heatsink. Is the board lifeless now?

[Stephen]

I am getting 20volts and 1 amp on the charger, now no image, CPU is getting hot and all the Power IC chips are hot. I am like wait this was not like this before :/ I am taking a break from this computer.

[Stephen]

Test the resistance of R5215.

CPU will be hot when it is working. The CPU (regardless of make / brand) are current sucking pigs. Kind of like the salt eating pigs on (original) Star Trek except they would turn into mega babes (Nancy?) after eating the salt. The mega babes may have high blood pressure but were hot enough to be pursued by Captain Kirk (only).

Well here, the Apple or whatever crapware CPU is onboard, will heat up if without a heatsink. Is the board lifeless now?

Board is not turning on, lifeless now. Crapware as always :/

MagSafe 3 cable is blinking orange every half second when connected to another computer to try to see if it is in recovery or DFU. Nothing