820-02100 intermittent or slow charging

[2informaticos]

Same behavior with Magsafe connector?

 

[grmacs]

Yes

 

[2informaticos]

Any fault history available?

 

[grmacs]

There was signs of liquid near R5220 but nothing appeared corroded. Initially I thought battery mustve gotten damaged as it was loopiing and new battery brought it to life but now I'm realizing the original battery was likely just completely dead from not being able to charge.

 

[2informaticos]

Check resistance (ohm scale) over C5220/60.

 

[grmacs]

Good call. found some corrosion and fixed it and diode check everything good. fired it up and was good for a moment then went to 5v no amp draw. U5200 shorted out. fek. is there anywhere to get one besides donor? I've been looking but not figuring it out.

 

[2informaticos]

You can replace with new, or one removed from other board (not exact same model).