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Ok, finally got back to this one. I replaced r7021, c7020, r7022. resistors measure correctly. I have continuity between all components so traces are fine. I get 12.6v but it constantly fluctuates. I went back to the Q7085 and I get 16.5v for a couple of seconds, then it fluctuates down to about...
OK, I replaced the ISL and I have my green light back, but I am back to a fluctuating 12.6v PPBUS_G3H
Any help would be appreciated
C7050 = 3 OHM
C7020 = OL
Quick update: Because of the fluctuating voltage and how low it was, I decided to replace the boost capacitor C7025. I now have steady voltage on PPBUS, but it is low at 9.56v
If i understand what you are asking I put the probes on the top of the caps individually? If so I got OL on both, if...
I did get 12.6v on pin 1 of the fuse once removed, but no PPBUS, i also have 15.06v on charger a gate
Ok, I seem to be getting the 12.56v, but its fluctuating. It starts at 12 and then drops, then spikes back to 12.
PPBUS_G3H 1.06k measured at F7040, diode mode at .445v, resistors check out at 10 and have continuity to the ISL, no corrosion around ISL. I do get the 12v rail only when battery plugged in but I do not get orange light or boot
So I have another 2879 board with green light and no boot.
Have SMC_PM_G2_EN
PPBUS_G3H is .65v
Liquid damage on back side of board near Q7560, some corrosion on c7561,c7563
Looking for some direction
OK, reflowed the smc, now i have no green or orange light and does not turn on at all. Have PPBUS_G3H, PPVIN S5 HS, PPDCIN_G3H,PP3V42_G3H
Am i to assume i killed the SMC?
I used to have a working computer that would not come out of sleep, now I have one that won't turn on at all!
Ok, thanks. Will do., Just curious though, the smc is on the complete opposite end of the board, why would you think liquid would have got there? there are no signs of liquid anywhere around it. I am just trying to be cautious before i try to reflow the SMC. ( i have never done it before and...
Minor water damage near display port, no evidence of dropping. Seems to work normal as long as it does not sleep. Once it sleeps then has to have reset to start again
Have the PP3V3_S4 rail present with charger plugged in. Can be shut off and turned back on, just not from sleep mode
Have a computer that works until it sleeps, then never wakes up. I have to reset SMC to make it power on again.
Totally have no clue how to begin.
Need to resurrect it! :-)
No Title
Well, I checked my data against a know good board(the one I am typing on)
The values were very close to each other so i decided everything was normal
I am proud to say that the screen is fixed and the computer is fully functional!
Just a note, it is a mid 2014 15" Macbook pro.
Thanks...
Ok, finally got everything done. New inductor, new lcd connector. Trace was blown on PP5VR3V3_SW_LCD at pin 1 of L8300 so I ran a wire to C8301 pin 1
Pin 27 ground trace was blown on lcd connector so I connected it to pins 25 and 26
Pin 28 trace was blown so soldered 28,29,30 together
In diode...
Ok, finally got everything done. New inductor, new lcd connector. Trace was blown on PP5VR3V3_SW_LCD at pin 1 of L8300 so I ran a wire to C8301 pin 1
Pin 27 ground trace was blown on lcd connector so I connected it to pins 25 and 26
Pin 28 trace was blown so soldered 28,29,30 together
In diode...