The Lixon LN‑7 G1706‑2 is a semiautomatic constant‑speed wire feeder that uses the Lincoln GMA control board (G‑1706‑2) for drive and feed regulation. Common failures on this unit include burned or tripped fuses in the power supply, damaged contactors on the motor driver, and worn drive roll bearings causing intermittent feeding; the GMA board itself can fail due to overheating of its MOSFET array or a shorted I/O line. First‑check diagnostics: verify 24 V DC input voltage and ground continuity, inspect the control board for visible burn marks or capacitor bulging, and review any stored error codes via the feeder’s diagnostic display or serial log. If power is present but feeding stops, test the drive roll motor current draw and replace any failed contactors before re‑energizing.[oss-gpt-20b]