Fix Guitar Preamp Issue

I need help fixing a guitar preamp that's not producing any sound. The issue arose right after installation, and I suspect the input/output jacks might be faulty.

Requirements:
- Expertise in repairing guitar preamps
- Experience with diagnosing and fixing input/output jack issues
- Ability to work efficiently and provide a reliable solution

Ideal Skills and Experience:
- Background in electronics repair, particularly for audio equipment
- Attention to detail and problem-solving skills
- Previous experience with similar projects would be a plus