Question Asrock b365 Pro4, all USB ports doesn't work anymore, why?

[remedy_98]

So, I bought this motherboard, ASRock b365 Pro4, everything works fine except the USB ports on the back and the front, the only way to use a keyboard and a mouse is by installing a PCIE USB extension, and the USB 3.1 seems to function normal with my ADATA 3.0 USB disk, me trying to fix it did the following:
-First i checked all the fuses since they're number 1 suspect when it comes to failed USB port, they all works fine (by all i mean all the ones in this motherboard),
-Checked the power output of all USB Ports using a multimeter and a stripped USB cable, all works fine delivering 5.1 Volts each,
-Checked the DATA pins and lines and found that all of the DATA (including AUDIO, HDMI ...) lines are passing by an ESD (Electrostatic Discharge) Protection IC, messing with the multimeter i concluded that they ESD Protection works fine as well,
-I suspected the BIOS might be the issue so i updated the bios multiple times, 4.0, 4.2, 4.3 and 4.4 all of them didn't work, plus i excluded the BIOS since the USB PCIE extension works fine.
-I tracked the USB pins and figured out that all USB Ports on this motherboard are being controlled by the Intel b365 controller, Except the USB PCIE extension, it is linked to a different USB/PCIE controller which explains why it works and the ones linked to Intel's B365 doesn't.
My Question is, even tho i am kind of sure that the cause of this problem it the B365 controller, i wonder wether am i missing something? should i risk it? is it fixable?
the link to this motherboard schematics boardview is:

Boardview - Asrock B365 PRO4 70-MXB9V0-A01 Rev 1.01 Boardview

Asrock B365 PRO4 70-MXB9V0-A01 Rev 1.01 Boardview

dr-bios.com

(you got to sign up to download schematics and diagrams tho)

 

[Aeacus]

i wonder wether am i missing something?

Brand new MoBo or used?

If brand new, RMA it.

If used, may want to look towards repairing of it.

is it fixable?

I can't tell that, since i don't deal with electronics repairs. But there are those who do it and one of the better ones would be Northridge Fix,
link: https://northridgefix.com

Alex (founder and owner) often posts electronics repair videos to his Youtube channel, that i find interesting to watch.
E.g this laptop MoBo repair;

View: https://www.youtube.com/watch?v=8TP5tgfUGhE


Alex repairs all kinds of PC hardware: MoBos, GPUs, SSDs, CPUs and other similar electronics as well (PS4/5, Xbox, tablets, smart phones, car key fobs etc.).
So, either send your MoBo in for repairs by including all the minute details you've found out; OR ask how to repair it on your own, given that you know where to buy the replacement chip and know how to solder. (You can buy soldering equipment from Northridge Fix online store.)