820-00923 no charge

I have an 820-00923 that is clean and does not charge. On 3 ports it gives me 20v 0.1A, one port is not taking power. I measure 0v on FB200. No short on this line or on any of the caps near CD3215. Tried different charge ports and the connector on the board and small IC around it also look fine. Where should be looking?
 
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