Macnook Air A1304 Power Problem

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I wonder if anyone here can guide me how to repair a power problem in a MacbookAir 2.1 A1304 1,86Ghz.
The problem is that the board isn´t charging the battery and when the magsafe is connected no led in it comes up.
But the board isn´t blown. I can start it if I plug a charged battery (works with battery).
Also it´s not the magsafe connector board since I have tested a different one and it does the same.
Another way that this board starts is if unplug the magsafe, press the power button on the macbook air for a few seconds, leave the power button, plug the magsafe and press the power button again it starts... :S With the fan at maximum speed, but starts. Although working from the magsafe it does´t charge the battery and still no led in the magsafe. But rather than that all works.
So it leaves me to the conclusion that this is a malfunction in the mother board circuit in the battery/power area.
Can anyone guide me on how can I solve this or what component in the board can be causing this? I have some capacity with iron solder and was hopping to repair it myself.
 

chscag

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So it leaves me to the conclusion that this is a malfunction in the mother board circuit in the battery/power area.
Can anyone guide me on how can I solve this or what component in the board can be causing this? I have some capacity with iron solder and was hopping to repair it myself.

You're likely correct as to what's causing the problem. However, the MacBook Air is not an easy machine to take apart and effect repairs. You might want to go to www.ifixit.com and take a look at the breakdown and take apart instructions for your model.
 
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Posted also in ifixit but until now, nothing. I don't think I'm the first one on a macbook to have power/battery issues, but...
I've isolated the problem. It's really on the motherboard. But simply can't figure out what is the component in the motherboard causing this.
I need advise from more electronic repairing guys who could give a help here.
:[
 

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