820-02020-a Charging problem


Hey, got new interesting board on table, no liquid no burnt area. everything like new. Board not charging. but when using dc it turn on and working, but when i remove battery both ports 5v and 0.025A. and when battery connected 1 port is 5v and another is 20v 0a and still not charging, tryed 4 different usb controllers, every time same behavor. Where to start, what to do ?


Staff member
You may have bad resistor (even capacitor) on USB-C area.
Compare readings between UF400/500 for surrounding RF4/5xx.

Just in case, try DFU mode...