820-3209 intermittent wifi

[andrespi]

INTERMITTENT OPERATION, SOMETIMES WORKS WELL, AND THEN APPEARS AS NOT INSTALLED HARDWARE,
I already changed the wifi card for another and the same problem appears
some story: change the component u3800 and C3800 for another due corrosion

 

[2informaticos]

Inspect U4002 area for corrosion.
Post its voltages; when wifi is not dertected.