Hi all,
Looking for some assistance hopefully
I purchased a 2nd hand Macbook Pro 2011 A1278 about 8 months ago.
Everything worked fine with the laptop for months, about 2 months ago the laptop suddenly stopped charging the battery.
The laptop can run from mains power alone (disconnect battery and power on)
The Magsafe charger light goes green when plugged in
The Magsafe charger light does not change colour when plugging in (with battery connected)
The Laptop can run from a battery that holds charge, it just does not charge it.
I replaced the battery with a newer one as the stock one was near the end of its life and said service battery, I suspect the battery i purchased although claimed it was genuine OEM damaged the Logic board.
I purchased a 3rd battery to double check, the laptop ran fine from the battery but would not charge it.
I have swapped the DC board to see if that might be the problem. But didnt fix it.
I have a pdf service manual and also openboard so I can find the relevant resistance values etc.
Reading other forums it seems it could be a problem around the U7000 chip and the resistors for battery sensing etc.
I have read the following resistors:
R7011 - 1.3, should be 9.31K, it also has ground both sides so shows this is gone I think?
R7010 - 30k correct
R7013 - Missing ?
R7012 - 1K correct
R7015 - 100K Correct
R7086 - 332K correct
R7021 - 10 correct
R7022 - 10 correct
R7025 - 0.2 (close enough)
R7052 - 9, should be zero?
R7051 - 2.5 close enough
R7001 - 4.9 close enough
R7000 - 0.2 close enough
R7002 - missing?
R7016 - 3.01K correct
R7005 - 137.6 should be 20?
So i have 2 that are missing from the diagram, then 3 that are reading different values.
Are the 3 resistors that have wrong values linked at all you think? I am apprehensive about purchasing the soldering equipment and resistors if there could be a greater problem here. Wondered if anyone would have any advice to give or other things to check whilst I'm at it?
I have also attached pic of the battery info in Apple System info.
Any help would be greatly appreciated.
Looking for some assistance hopefully
I purchased a 2nd hand Macbook Pro 2011 A1278 about 8 months ago.
Everything worked fine with the laptop for months, about 2 months ago the laptop suddenly stopped charging the battery.
The laptop can run from mains power alone (disconnect battery and power on)
The Magsafe charger light goes green when plugged in
The Magsafe charger light does not change colour when plugging in (with battery connected)
The Laptop can run from a battery that holds charge, it just does not charge it.
I replaced the battery with a newer one as the stock one was near the end of its life and said service battery, I suspect the battery i purchased although claimed it was genuine OEM damaged the Logic board.
I purchased a 3rd battery to double check, the laptop ran fine from the battery but would not charge it.
I have swapped the DC board to see if that might be the problem. But didnt fix it.
I have a pdf service manual and also openboard so I can find the relevant resistance values etc.
Reading other forums it seems it could be a problem around the U7000 chip and the resistors for battery sensing etc.
I have read the following resistors:
R7011 - 1.3, should be 9.31K, it also has ground both sides so shows this is gone I think?
R7010 - 30k correct
R7013 - Missing ?
R7012 - 1K correct
R7015 - 100K Correct
R7086 - 332K correct
R7021 - 10 correct
R7022 - 10 correct
R7025 - 0.2 (close enough)
R7052 - 9, should be zero?
R7051 - 2.5 close enough
R7001 - 4.9 close enough
R7000 - 0.2 close enough
R7002 - missing?
R7016 - 3.01K correct
R7005 - 137.6 should be 20?
So i have 2 that are missing from the diagram, then 3 that are reading different values.
Are the 3 resistors that have wrong values linked at all you think? I am apprehensive about purchasing the soldering equipment and resistors if there could be a greater problem here. Wondered if anyone would have any advice to give or other things to check whilst I'm at it?
I have also attached pic of the battery info in Apple System info.
Any help would be greatly appreciated.