This one came in after a battery replacement claiming they have no power when the battery is plugged in, but intermittent power when the battery is unplugged. I can confirm this every other time I plug in the charger I get a green light and fan spin, but every other time I get no green light and no fan spin. PP3V42: 3.42 PPBUS: 12.28 volts. No power ever with battery plugged in. Is this a dead SMC or should I look elsewhere? Was liquid damage near the DC in port and fuse easy to scrub away with alcohol and toothbrush as no components were burned.
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820-3332 Intermittent power/green light
- Thread starter JohnB8812
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Update, now it's magically working off the battery.... any insight is appreciated because idk what the fuck is going on with this lmao\
I got it to work a few times off the battery now it is not. I hate to keep spamming this, but I just want to give as much detail as possible
I got it to work a few times off the battery now it is not. I hate to keep spamming this, but I just want to give as much detail as possible
I measured originally without the keyboard attached. Without keyboard attached: SMC_RESET_L: 3.4 SMC_ONOFF_L: 3.4 volts. PPBUS gives me weird measurements too like 0.8 volts with a 3 Millionohms resistance to ground then once and a while 12.28 volts then when the board actually kicks on its 12.58 volts.
Ok so after reflow now I'm getting weird readings.
PP3V42: 3.42 volts
PPBUS_G3H: 0.35 volts
SYS_ONEWIRE: 0 volts
ADAPTER_SENSE: 0 volts
SMC_BCAC_OK: 0 volts
I get 3.42 volts on the SMBUS pins on the ISL
PPCHRG_DCIN: 18 volts
PP5v1 charger: 5.1 volts.
Is this an SMC issue or could this be an ISL issue? I just want to be sure before I go and replace the SMC. The computer was brought in with a knockoff charger btw, so I was curious from the start if it wasn't SMC related.
PP3V42: 3.42 volts
PPBUS_G3H: 0.35 volts
SYS_ONEWIRE: 0 volts
ADAPTER_SENSE: 0 volts
SMC_BCAC_OK: 0 volts
I get 3.42 volts on the SMBUS pins on the ISL
PPCHRG_DCIN: 18 volts
PP5v1 charger: 5.1 volts.
Is this an SMC issue or could this be an ISL issue? I just want to be sure before I go and replace the SMC. The computer was brought in with a knockoff charger btw, so I was curious from the start if it wasn't SMC related.
First thing you need is green light. Seems like your ACOK is gone so that is where you should look first. The usual checks on U7000, ACIN, DCIN, resistance between pins 17/18 27/28. Make sure this stuff is discharged! That is why you are measuring a "short" which later is gone. This is a good way to fry stuff with charge left on PPBUS.