in_sympathy

Hi guys. Help needed with 2 things: 1) there are 3 components on Asus Tinker Board S in the middle of the board (check pics attached). As you can see I need to replace one of those. What are they? (marked as CJ) also now I see that this part is shorted - which correlates with around 4-5 Ohm resistance I see on the nearby caps - what is this chip marked C4C? Here's the schematics, but I can't figure it out myself yet, though I'am more than capable of microsoldering 🤷‍♂️ Thanks a lot in advance 🙏.