The Roland GX‑24 Main Board (part 6877009090) is the central controller for a 24″ vinyl cutter/plotter, handling motor drive signals, sensor inputs, and communication with the host computer. Common failure points on this board include power supply decoupling capacitors, solder joints on the main MCU or DSP, and the high‑current driver ICs that control the cutting head motors; firmware corruption can also cause erratic operation. First‑check diagnostics should verify the 12 V/24 V rail voltages, inspect all connectors for corrosion or broken pins, and review any error codes displayed on the cutter’s LCD or sent to the host PC. If power is stable and no obvious hardware damage is seen, run a self‑test routine (if available) or replace the board with a known good unit to isolate the fault.[oss-gpt-20b]