For $29/mo, we provide access to advanced level technicians who will answer your questions on any Macbook board related matter to the best of their knowledge promptly & walk you through how to solve your problem so you can deliver a working board to your customer.
My reference only: TT10189
Problem: liquid damage, does not turn on even though USBC meter shows 20v.
Work done so far: C9589 had a short and was replaced. CHGR_BGATE has 12v but is unstable, it drops to 4v then back up to 12v. I have already replaced U7000, I also removed all the capacitors on...
Sorry I am just now getting back to you on this. I normally document these with a ticket number but this one I did not. Must have been before I started doing that. I vaguely remember this but It may have been something I did a manual DFU on by pulling up the pads to 1.8v. Could not say for 100%...
My reference only: TT10141.
Problem: I need to purchase a mosfet chip from board 820-02100 M1 Pro, that is supposed to be Q5820 but according to Digikey, the schematic diagram I sent them, neither are relevant to the actual mosfet specification I sent them. I just basically need to find this...
I think U9300 could be a culprit. I removed it and USB-c was read 5v, but PPVIN_P1V8VDDH_CTRL_VIN was stable at the 12v having removed U9300.
Got U9300 back on and I am getting the same reboot looping.
Testing R9330 and it seems a little low 1.195v to 0v looping.
What exactly does the Viper...
My reference only: TT10141
History: Coffee spill. Lot of damage around UP800, U9300. There is a lug at the bottom left corner of resistor RP860 that is missing. No documentation on what this is for. Q5240 had looked like it had damage.
Current issue: I plug in the USB-C meter, it goes to the...
P3V8AON_VSW1 is now at .356 diode mode!
P0V9_LX0_NAND0 is .286 should be .310.
P0V9_LX1_NAND0 is .291 should be .310.
P1V2_LX0_NAND0 is .004 should be .306, looks like we got a problem here. Glad you told me to check the coils.
I removed LN430 and the short is on pin 2 or on PP1V2_NAND0.
UN400 seems to be getting hot from voltage injection in to P3V8AON_VSW1. Q5840/20/00 I removed because all these were getting hot too. I took those off one by one and now UN400 is suspect. I originally looked at this board thinking something could be going on with the SSD. What dio you think? I...
QC280 had a short! I am getting consistent pulling of .44 amps now wheas I was only getting the amps pulled for the first few minutes and it would drop to 0 amps. Pins 6 on QC280 which is P5VS2_DSCHG is getting 1.96v while plugged in. I had removed both C5701 and C5702 as they both looked a...
P3V8AON_SW3 diode mode is 2.278
P3V8AON_SW2 diode mode is 2.278
Q5840, Q5820, L5840, L5820, and R5800 are currently lifted with the above readings.
In addition, L5800 is now lifted too, P3V8AON_VSW1 is .490 diode, .PP3V8AON_PH1 diode is .056.
Everything keeps pointing back to PP3V8_AON like you...
Thank you. I have not put back U8100 yet but poking around P3V8AON_VSENSE diode mode reading is .05, should be .356. What is this sensing? I keep coming back to this area too but NOSTUFF is in this area.
Okay, let me bounce this off you then if I may. Since I removed U8100, the up and down voltage on L5800 pad 1 is now for the most part stable at 3.9v. This may be because of removing U8100? However in the process, I knocked a few other components around U8100 off. So I will be cleaning the area...