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Do you know what's required as input on U7800 for it to make PMIC_EN_P3V3S5 high ?
PMIC_EN_P3V3S5 is PGD, so does that mean that it needs VSD to be good ? Or VSA, VSB, VSC, VSD all need to be good ?
I assume VSx stands for Voltage Sense, and PGx stands for Power Good, so I'd expect PGD to turn...
No, no pulse. It goes from floating state to 0V when I connect charger and that's it. And I do get the LDOs (PP3V1_RTC, PP3V3_LDO3V, PP1V25_VREF) with the new chip too.
So, you suggest that I try again with another U7800 ?
Diode mode at 5V_S5 is 0.410V, so there's no short.
Traces, solders and probe points look okay, and I have tested continuity for the few ones I had a small doubt, they are all good.
I guess I'll try to replace the chip, just in case as you said, but I can't see how it can be the issue when the...
Hi, I have this 820-00840-A board with liquid damage around U7650 and the backlight stuff also.
I've narrowed it down to U7650 not creating PP5V_S5 and that's due to PMIC_EN_P3V3S5 missing.
So, checking around PMIC, I could see that PP3V1_RTC is good, PP3V3_LDO3V is good, PP1V25_VREF is good...
The liquid marks are not on U7800, just to make it clear. That area looks pristine.
But yeah, my action plan right now will be to remove the few caps on the PP3V1_RTC line and check if the short goes away.
If not, then I will reheat U7800, and if this still doesn't help, I will remove...
I have this board that have signs of liquid spill. It won't turn on.
CD3215 stuff works fine, I get 20V on the charger, so I have good PP3V3_G3H and PPBUS_G3H is present also.
But then I get no other rails, no S5, S4 and probably nothing else either. The enable signal for those rails all...
I'm not quite sure if this is a logic board issue, but since it may, I'm asking anyway. I got a 15-inch touchbar macbook pro with no keyboard and no touchpad.
Knowing that keyboard goes into the touchpad, I immediately suspected the touchpad or its ribbon cable.
The cable got replaced but...