Hi, I need some troubleshooting a fan spin and stop once on a Macbook Air 820-3437-B. I get green then orange, little fan spin then nothing, USB sticks blinks once. Current sensing resistors on U7100 are good resistance.
The board was initially liquid damage, I restored PP3V42 and the device worked well for a while. Then it would only boot if I press the power button until I see the apple logo and when it did boot, it was really slow. I took it apart and saw some corrosion around J1800 and I cleared that up (flux and boil and applied fresh solder then cleaned up). I also noticed C7094 had some corrosion so I changed that as well the work I did before to restore PP3v42 was in this area so everything else was good.
The board was initially liquid damage, I restored PP3V42 and the device worked well for a while. Then it would only boot if I press the power button until I see the apple logo and when it did boot, it was really slow. I took it apart and saw some corrosion around J1800 and I cleared that up (flux and boil and applied fresh solder then cleaned up). I also noticed C7094 had some corrosion so I changed that as well the work I did before to restore PP3v42 was in this area so everything else was good.
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