The Roland GX‑24 is a vinyl cutting plotter that uses a dedicated main control board (part 6877009090) to drive the motor drives, encoder feedback, and user interface. Common failure points on this board include degraded power‑rail regulators, burnt or cracked surface‑mount components, and broken connections to the LCD panel or motion drivers; these often manifest as intermittent operation, loss of motor control, or blank display. First‑check diagnostics: verify 12 V/5 V rail voltages with a multimeter, inspect for visible component damage or solder bridges, and confirm that all I/O connectors (motor headers, encoder inputs, LCD ribbon) are securely seated; if error codes appear in the machine’s diagnostic menu, cross‑reference them with Roland’s service manual.[oss-gpt-20b]