Repair Unreliable USB HUB pcb subpart Connection

I'm looking for an experienced electronics technician to diagnose and fix an unreliable USB HUB pcb part on a main PCB board. The USB HUB is sometimes detected and mostly not, but I'm unsure which component is causing the issue.

Requirements:
- Diagnose the root cause of the intermittent connection
- Repair or replace faulty components
- Ensure stable and reliable USB HUB operation

Ideal skills and experience:
- Expertise in PCB troubleshooting and repair
- Familiarity with USB HUBs and related circuitry
- Ability to diagnose issues without prior testing

Please provide a brief overview of your approach and relevant experience.