dock works on one side only

[fabthegreat]

I have bought a switch hdmi module on Ali express that are supposed to work both ways of the usb port.
It appears to work on one side only with the mother board I try to fix.

For all the other console I have here it works on both side. On an official dock, ironically, this is the bad side that is plugged, so no image. I have also tried with the official dock and an other non officiel hdmi module from ali express, same results.

I have, apart from that, an issue with the LCD connector or maybe the IC that smoked at a moment I don’t why, I have to checked on this later.

What I have done so far:

• I have checked all the continuity from the port to the filter and also the corresponding pads on the p13usb and everything is OK.
• I have controlled all the diod mode readings of the usb pins and P13usb. They seem fine according to what we can find on the internet.
• I had a torn pad (B2) on the usbc footprint, I soldered a jumper wire. I have checked the continuity with the filter, this is ok.
• I have changed the port 2 times, still the same

I have specifically focused my investigation on the pins of the port that transport the HDMI signal with an original dock, eg B1 => B8 and A9 => A12, but honestly I can’t find any fault.
What else? Could it be the p13usb anyway? I am quite out of idea…


Thanks for your support