[SOLVED]a1278 2012 820-3115 only runs with charger plugged in ,quarter fan spins with battery
Hi guys,
I have a liquid spilled 820-3115 board. the area around SMC got some spills, not severe though. ultrasonic cleaned then replace the cracking looking components.
Machine can power on now and everything runs.
Here is the probelm:
The machine only power on with charger is plugged in, it can't turn on when charger is disconnected. with battery fully charge and connected, when you try to turn on,it will be quarter fan spin.
the system can detect the battery and charges it.R5280 ,R5281 both have 3.3v on 2 pins of theirs.
Ran ADT got one error:4SNS/1/40000000:VC0C-3.196
Did some research and say's it's CPU voltage sensor.
not sure if the CPU is related so I just point my finger to other signals. I checked SMC_BATLOW_L, when only battery plugged in, SMC_BATLOW_L is 0,so PM_BATLOW_L is 0 too.SMC_BATLOW_L comes from the SMC. and that means the SMC is bad? (I did a reflow on it but no change)
when I press power button, both of the signal jumps to 3.3v then back to 0 along with the quarter fan
my thought is just kind of massive now and dont know where to go.any advice would be appreciaited!
Hi guys,
I have a liquid spilled 820-3115 board. the area around SMC got some spills, not severe though. ultrasonic cleaned then replace the cracking looking components.
Machine can power on now and everything runs.
Here is the probelm:
The machine only power on with charger is plugged in, it can't turn on when charger is disconnected. with battery fully charge and connected, when you try to turn on,it will be quarter fan spin.
the system can detect the battery and charges it.R5280 ,R5281 both have 3.3v on 2 pins of theirs.
Ran ADT got one error:4SNS/1/40000000:VC0C-3.196
Did some research and say's it's CPU voltage sensor.
not sure if the CPU is related so I just point my finger to other signals. I checked SMC_BATLOW_L, when only battery plugged in, SMC_BATLOW_L is 0,so PM_BATLOW_L is 0 too.SMC_BATLOW_L comes from the SMC. and that means the SMC is bad? (I did a reflow on it but no change)
when I press power button, both of the signal jumps to 3.3v then back to 0 along with the quarter fan
my thought is just kind of massive now and dont know where to go.any advice would be appreciaited!