Ian Canada Purepi 3.3v no power output

I recently built a streamer consist of:
Purepi, Rpi4b, receiverpi ddc, amanero 384, fifopiq7, hdmipipro and Ucconditioner 3.3v. All the device are function ok, except the J2- 3.3v of purepi ;no power output. I have checked and tested the fuse, it is ok. I have set the S4 switch to off position (enable battery function). All the D11, D1,D13,D8, D10,D4 LED are lit, but the J2 - 3.3v still no power output. Is anybody facing the same problem? what could go wrong? From the photo, u can see no power output to the ucconditioner. Pls assist. Thank you.
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