Hi people,
Here I have a strange case from this A1990. It came from an other shop, and was initially took in charge for battery replacement because it was inflated.
When I took it in charge, The Mac run fine on battery and also on charger when battery unplugged, but It has a charging issue. Three differents battery has been tried, and also battery cable. I can see charging spikes when the Mac is off and battery plugged. It goes to 0,8A for 2-3 secs, and goes to 0A, cycling. The battery pourcentage was shown in MacOS.
Then I found light oxydation on one of the CD3215, I replaced it and some caps and R around. No change. With a thermal cam I saw Q7030 getting hot when charging spikes come, I replaced it. From this point, the battery pourcentage was not shown anymore on MacOS. The Mac can still run on battery and charger.
Then I replaced R6910 because of bad reading (15k instead of 4.7k), no change.
I checked current sensors around U7000, they were fine, I replaced Q7040 and Q7065, and also U7000.
This is the last thing I have done on this board, the behavior is still the same, I have a pretty bad understanding of what is going on and why the battery works, but cannot charge and being shown on MacOS.
I really appreciate to have a little help on this one, thank you.
Here I have a strange case from this A1990. It came from an other shop, and was initially took in charge for battery replacement because it was inflated.
When I took it in charge, The Mac run fine on battery and also on charger when battery unplugged, but It has a charging issue. Three differents battery has been tried, and also battery cable. I can see charging spikes when the Mac is off and battery plugged. It goes to 0,8A for 2-3 secs, and goes to 0A, cycling. The battery pourcentage was shown in MacOS.
Then I found light oxydation on one of the CD3215, I replaced it and some caps and R around. No change. With a thermal cam I saw Q7030 getting hot when charging spikes come, I replaced it. From this point, the battery pourcentage was not shown anymore on MacOS. The Mac can still run on battery and charger.
Then I replaced R6910 because of bad reading (15k instead of 4.7k), no change.
I checked current sensors around U7000, they were fine, I replaced Q7040 and Q7065, and also U7000.
This is the last thing I have done on this board, the behavior is still the same, I have a pretty bad understanding of what is going on and why the battery works, but cannot charge and being shown on MacOS.
I really appreciate to have a little help on this one, thank you.