On-Site ASIC Miner Repair

My Bitcoin mining farm sits just outside Sugar Land / Rosenberg, and several of the Bitmain-style ASICs have started dropping hash rate. I need an electronics-savvy technician who can come to the site... (Budget: $30 - $250 USD, Jobs: ASIC, Electrical Engineering, Electronics, Firmware, Local Job, Soldering, Troubleshooting)