Good morning, this macbook does not power on. By connecting the (non-original) power supply it negotiates 20V and absorbs 1.40A (battery connected and perhaps charging). Disconnecting the battery it stores at 5V and after about 5 seconds it rises to 20V and absorbs 20 mAmp. I did a quick check under the microscope but I didn't find any oxidation damage, it seems perfect. I checked the main rails and they seem ok.
PPBUS_G3H 13,070v
PP3V3_G3H 3,42v
PP5V_S5 5v
PP3V3_S5 3,31v
PP1V_S5G 1v
PP1V8_S5 1,80V
PPBUS_G3H 13,070v
PP3V3_G3H 3,42v
PP5V_S5 5v
PP3V3_S5 3,31v
PP1V_S5G 1v
PP1V8_S5 1,80V