The Dynapath Delta 10MU is a compact CNC controller used on small‑to‑medium milling and turning centers, featuring an integrated PC‑style processor, I/O board (model 4201093), and F20 power supply. Common failure modes in this line include loss of communication with the host computer or spindle drive, erratic axis motion due to degraded stepper/servo drivers, and power‑supply overheating that can trigger the built‑in watchdog reset. First‑check diagnostics: verify 115 V single‑phase input voltage and ensure the F20 supply is within spec; inspect the 4201093 I/O board for burnt components or loose connections; review the controller’s error log for communication or motor driver faults before proceeding to deeper firmware or hardware replacement.[oss-gpt-20b]