Working on a Lenovo Yoga 910-13IKB, model name 80VF. This unit had liquid damage to the USB C DC in board and ribbon that was preventing it from charging properly when the adapter was plugged in. The unit would sometimes not detect the charger at all, other times it would rapidly cycle from charging to not charging (about every 1-2 seconds) when the adapter was plugged in. There was some corrosion evident the DC in board and ribbon so I replaced them both with a new unit however the same symptoms still persist in the form of rapid cycling between charging / not charging. Clearly there is some component damaged on the motherboard itself however there is no visible corrosion or damage to the motherboard itself.
I have a hot air station and microscope so if I can locate the defective component I can probably replace it but I can't locate any schematics for this board and other than haphazard application of freeze spray in the general vicinity of where the ribbon for the DC in board connects, I'm not sure where to start.
You can view photos of the board below.
Any tips would be greatly appreciated.
I have a hot air station and microscope so if I can locate the defective component I can probably replace it but I can't locate any schematics for this board and other than haphazard application of freeze spray in the general vicinity of where the ribbon for the DC in board connects, I'm not sure where to start.
You can view photos of the board below.
Any tips would be greatly appreciated.
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