Got one that has me stumped; first one in a while of this type!
1. 820-00138, no liquid, no damage from aftermarket charger or anything at all. Board powers on and boots, but has no green light.
2. Confirmed SMC_BC_ACOK, SYS_ONEWIRE, 3v42, etc, are all present across board and near SMC.
3. SMC_RESET_L is high, as system boots/works.
4. Board does power on with charger only, just has no green light.
5. Inspected entirety of ISOL circuitry, replaced Q7010, Q7180, and D7010, as I've seen those cause funky issues like this, despite everything measuring fine. No change.
6. Replaced ISL before finally replacing SMC, and no change.
7. Replaced U7000/7001 to be safe. No change.
8. Removed JTAG, no change.
9. Confirmed continuity from ISL --> SMC and confirmed diode readings with working board throughout SYS_ONEWIRE circuitry.
10. Pull up for smc_bc_acok good near SMC (R5187).
11. No bent/cracked ports on PCB or anything causing weird shorts, and all continuity is confirmed between sys_onewire/ISL/SMC/etc.
No clue from here; any help would be appreciated. Board isn't turning charger off because it powers...so not sure. It's probably a random resistor I haven't checked or something, but everything is pristine. All help appreciated!
1. 820-00138, no liquid, no damage from aftermarket charger or anything at all. Board powers on and boots, but has no green light.
2. Confirmed SMC_BC_ACOK, SYS_ONEWIRE, 3v42, etc, are all present across board and near SMC.
3. SMC_RESET_L is high, as system boots/works.
4. Board does power on with charger only, just has no green light.
5. Inspected entirety of ISOL circuitry, replaced Q7010, Q7180, and D7010, as I've seen those cause funky issues like this, despite everything measuring fine. No change.
6. Replaced ISL before finally replacing SMC, and no change.
7. Replaced U7000/7001 to be safe. No change.
8. Removed JTAG, no change.
9. Confirmed continuity from ISL --> SMC and confirmed diode readings with working board throughout SYS_ONEWIRE circuitry.
10. Pull up for smc_bc_acok good near SMC (R5187).
11. No bent/cracked ports on PCB or anything causing weird shorts, and all continuity is confirmed between sys_onewire/ISL/SMC/etc.
No clue from here; any help would be appreciated. Board isn't turning charger off because it powers...so not sure. It's probably a random resistor I haven't checked or something, but everything is pristine. All help appreciated!
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