Hurco 415‑0607‑002T is an I/O interface board used in Hurco CNC controllers and monitor assemblies, providing digital/analog inputs and outputs to the main control logic. Common failure points for this class of boards include burned or cracked surface‑mount components, degraded solder joints on power and signal traces, and failing opto‑isolators that can cause intermittent I/O errors or complete loss of communication with the host CPU. Start by verifying the board’s 24 V DC supply voltage and inspecting for visible damage such as burn marks or loose connectors; then check the status LEDs or diagnostic codes from the main controller to confirm whether the board is being detected, followed by a continuity test on key I/O pins against the schematic.[oss-gpt-20b]