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Ok a bit of an update I am very confused at this point. I cleaned the board and let it dry while trying to figure out what to do with it and clear my mind. Now when I measure PPBUS_G3H - 12.97V PP1V25_VREF - 1.24V PP3v3_S5 - 0.94V PP3v3_S5G - 0V USB - 19.4V 0.01A

No pulse

I can't find specifically 3v3_SUS but i suspect it's the PP3v3_S5G which is present

No corrosion or visible damage Replaced and now PP1V25_VREF - 1.24V PP3V3_S5 - 3.3V Taking 19.4V 0A

PP3V3_LDO3V - 3.27V PP5V_LDO5V - 4.97V SMBUS_SMC_PMIC_SDA (SMB_PMIC_SDA) - 3.39V SMBUS_SMC_PMIC_SCL (SMB_PMCI_SCL) - 3.38V PM_PGOOD_P5VS4 - 0V PPBUS_PMIC - 12.97V PMIC_EN3V3SW - 0V PP1V25_VREF - 0V

It was badly liquid damaged and a few resistors/caps missing on the board due to someone brushing it It was turning on and working but no audio jack (not detecting headphones) and bluetooth not working. After replacing the missing components and ultrasonic cleaning it is not turning on at all...

Ok i checked today it didn't turn on after leaving it for some time. PM_BATLOW_L - 3.3V I heated the PCH from below and it works. I guess that will be crap under the CPU. I will keep it as a test board as I don't think it's a reliable fix Thanks for the help

Here are the steps I took to check if that is the issue: 1 - Heated the PCH with some flux, the device turned ON. I ultrasonic cleaned and it didn't turn on again. 2 - I replaced R1301 with 330K resistor. It turned ON. I wanted to make sure if that will fix the issue so I ultrasonic cleaned...

I realised thats an old post after I posted ?

Shorted CPU and lots of corrosion around the board. Located in London, PM me if interested

R1301 measures 800+K Now it turns on of course when I left it overnight. Should I heat the PCH with some flux or leave it as is and test how it's going to go? Any recommendation in this case how to make it reliable? PCH_Intruder_L - 1.66V and it still turns on Edit: It might be worth...

PM_BATLOW_L - 1V PCH_DSWVRMEN - 2.45V PM_DSW_PWRGD - 3.45V PCH_INTRUDER_L - 1.67V PCH_INTVRMEN - 2.5V PCH_SRTCRST_L - 3.25V RTC_RESET_L - 3.24V

A bit of history before we start Liquid damage around the SMC and a few other areas. After repairing all the visible damage and traces it was still not turning on. I decided to replace the SMC and it turned out it had quite a bit of corrosion underneath, however, didn't turn on after the new...

I tried SMC reset and it worked. however, after the SMC reset it doesn't turn on at all. As far as i remember PRAM wasn't working when i tried it before that. I2C_IOXP_SCL/SDA diode - 651/622 Can't check voltage as it doesn't turn on now, i'm back on fixing it. PPBUS is 12.49, doesn't look like...

Liquid damaged board, repaired, and cleaned. The keyboard is not responding at all other than the power button. Tested with new known good trackpad and trackpad flex, still the same issue. I tried replacing U4820 and U4830, still the same issue. There are not broken traces on the trackpad and...

Just a quick update. Turns out i was measuring that specific chip with the probes the other way around It's all good. I ordered and replaced all 4 CD3215's just to make sure that's not the issue. Still, the same 2 ports are looping At this point, it's not even about fixing the board. I just...

Update: U3200 LDO measurements to ground with diode mode compared to the rest PP3v3_UPC_XB_LDO = 1647 (the other three measure approx 440) PP1v8_UPC_XB_LDOA = 1385 (the other three measure approx 460) PP1V8_UPC_XB_LDOD = 1379 (the other three measure approx 423) PP1v1_UPC_XB_LDO_BMC = 0L (the...

I am sorry I just clicked reply. No other reason. I replaced the SMC, exactly the same behavior. The original liquid damage was affecting only the middle of the logic board, both sides that contain the USB controllers were untouched. Is it worth stocking another 4x CD3215's and replacing all of...

I injected under 3V. It went away the moment i injected it and it stopped draining current in split second. I will replace the SMC and report back as it had originally had a liquid sign on top of it. Is there anything else that might cause U3200 to be the only CD3215 causing 5v looping and...

Do you mean I have a problem with the 2 that are not looping? If so, I just replaced both of them with the original CD3215's i had and they are still not looping. Isn't it when a port is looping it's the issue and when it isn't it's OK? Also referring to I also tried to replace the USB rom on...