820-02098 MagSafe cycling on/off

repMacFixit

New member
History: Board originally had a blown CD3217 chip. Replaced all 4 and all but U5500 is working as expected. When the MagSafe is connected, the light keeps cycling between green orange and off. PPDCIN_AON cycles between 5v and 0v, while PPBUS_AON cycles between 12.4v and 6.5v

Before i replace U5500 again, any suggestions and secondly, if i need to replace U5500, do i have to replace or 4 or can just U5500 be replaced alone?
 
Last edited:
Top