Wi-fi, audio, USB not working on Asus X202E

Hi, it's my first time posting here but I've read and learned a lot from this forum, so thank you all very much in advance!

I'm trying to repair a friend's Asus X202E notebook. It worked normally until it got stuck in the blue screen during startup, and wouldn't complete booting. Someone formated the HDD (including the recovery partition) and installed W8.1, which worked but with no sound or internet (wireless or cable). The device manager doesn't show these devices at all. One USB port doesn't work either.

I first thought it was a driver issue, but couldn't make it work. After many attempts I decided to try a W10 clean install, which is installed now, but the symptoms remain the same. I can access the internet through a USB wifi dongle.

I've tried:

- Using Windows troubleshooter;
- Downloading and installing many drivers from the Asus site, for many components (besides audio and internet cards);
- Downloading a X202E drivers compendium some good soul posted here in this forum;
- Using DriverEasy;
- Installing the audio card as legacy in device manager;
- Reseatting wi-fi card;
- Checking the logic board for damage (not good at this, but it looked alright);
- (Going to update as I remember more steps I tried)

I'd really appreciate your assistance in this matter, thank you all!