Wireless Microphone Repair

I'm seeking a skilled technician to repair my wireless microphone headset, which is not functioning.

Issues:
- No sound output
- Malfunctioning on both microphone transmitter and receiver

Troubleshooting already attempted:
- Changed batteries
- Checked all connections

Ideal skills and experience:
- Expertise in audio equipment repair
- Experience with wireless microphone systems
- Problem-solving skills for diagnosing sound issues

Please provide a detailed bid with your experience and approach to fix this issue.