Hurco 4204282 DC Power Monitor PC Card is an industrial board that interfaces a CNC controller with the machine’s DC power supply and provides real‑time voltage/current monitoring to the operator console. Common failure points on similar Hurco power‑monitor cards include burned or cracked regulator capacitors, damaged MOSFET drivers, and shorted I/O lines due to mechanical shock; these often manifest as erratic voltage readings or a complete loss of monitor display. First‑check diagnostics should verify that the card receives its required 12 V/24 V DC input (use a multimeter on the board’s power pins), inspect for visible component damage and solder bridges, and confirm that the I/O signals to the controller are clean by checking line voltage levels against spec sheets. If the board powers but shows incorrect data, review any error codes logged in the CNC system and perform a loop‑back test of the monitor’s serial or CAN interface.[oss-gpt-20b]