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Update on this one. I replaced the PCH on this board but I still have the same exact symptoms, so I don't think it was a PCH issue. The new PCH also gets warm though, as if there is a short to ground somewhere. I can't seem to find any shorts. Could a bad CPU cause the PCH to heat up?

Yea I think its the PCH. I noticed after leaving the board connected to the charger for a few minutes, the PCH seems to get warm. The CPU does not feel warm at all. I have never replaced a chip of this size before. It it something that can be done using just the Quick 861DW or I will need some...

Sorry forgot L8020. L8000 - 1.012 L8020 - 1.8 I checked the voltages on all the outputs on page 74 and they are all present.

Hello. I have a 820-00281 that is not liquid damaged, and the board looks completely clean. When I connect the charger it goes to 20v .380a and just stays there. CPU and GPU voltage is not present but all the main rails seems to be fine. All_SYS_PWRGD is 3.22v. I compared diode mode values on...

Check voltage on SMC_USBC_INT_L. I had a board with similar issue (0.77v on PPBUS) and it was R3038 causing the issue.

I finally fixed this annoying board! It was a blown R3038 that was causing the issue. SMC_USBC_INT_L was 0v, which is how I found the blown resistor. Replaced that, and now the board boots from the charger and charges the battery.

Well I am still struggling with this one. I have replaced almost every component on page 64 on the schematic, including U7000 and Q7030/40 multiple times with the same results. I checked all the traces for each connection and they are fine. I even compared diode mode values on all the pads for...

I left it running a little longer and now macOS reports the battery at 84% but hwmonitor says 80%. It did stay at 100% for a long time though for some reason. I will check the SMC again later. Anything else besides U7000 that could cause this issue?

When connected to a battery and a charger, the amp meter always stays at 20ma, even when the board is fully on a booted into MacOS. The battery Icon in MacOS shows this battery is at 100%, but it says its not charging in system info. I checked in HWmonitor and that shows the battery percentage...

Well I replaced everything around U7000 and U7000 itself again, and still have the same issue. I tested continuity to all of the pads of U7000 when I had it removed and did not find any broken traces. Can't find any broken traces between U7000 and Q7030/40. Out of desperation I changed the SMC...

I just tried replacing U7000, Q7030, Q7040 and all the resistors and capacitors around U7000 and PPBUS is still .7v with the charger. I have no idea what to try next, but this board is really getting on my nerves.

No it does not seem to turn on in SMC bypass mode.

With a fully charged battery connected, the board boots and works fine. If I connect a charger to it though, it says its charging, but the meter says 20v 0.02a so its not charging the battery. Board will not turn on with only charger connected.

I have tried 3 ISL chips already. One brand new, one from a broken donor board, and one from a donor with dead CPU, but working PPBUS circuit. All of them give me .7v PPBUS with the charger. I put the board in another top case with a battery and with battery connected, I get 11.3v on PPBUS and...

Diode mode is 0.389 for both the SCL and SDA lines. Both lines have 3.27v, but they both pulse down to 2.7v over and over again. Maybe bad SMC or PMIC?

Red probe to ground: F7000 - 0.408 Black probe to ground: F7000 - starts at like 0.600 and quickly goes up until the meter reads OL.

I removed F7000/1 and checked voltage at R7060 but all pins are 0v. Pin 2 of F7000/1 still shows .7v

Replaced the ISL again, and also replaced C7030/40 and L7030 at the same time, but still have the same issue. I checked continuity to Q7030/40 with U7000 removed and did not find any broken traces. I also compared diode mode values around U7000 with another board, and did not find anything out...

They all appear to be good

Hello. I got an 820-00281 that is liquid damaged and has low PPBUS voltage. Every liquid damage indicator on the board is red, but only found corrosion around the backlight circuit and left speaker circuit. Board is using 20v 0.03v when I connect to just the charger. PPBUS starts at 0v when the...