Graphtec 7071‑01E Main Board is the primary control module for Graphtec FC8600/FC7000 vinyl cutters, housing the microcontroller, power regulation circuitry, and I/O interfaces to drive stepper motors and sensors. Common failure points in this class of industrial controllers include damaged voltage regulators (especially under high load or surge), burnt-out MOSFETs on motor driver outputs, and cracked solder joints on the main power input pins. First‑check diagnostics: verify 12 V/24 V supply rails with a multimeter; inspect for visible burn marks or loose connections on the board’s power traces; and review any error codes displayed on the cutter’s panel or logged in its firmware.[oss-gpt-20b]