She swapped it with a known-good spare from a decommissioned lathe. The spare module blinked differently—once, then a steady red. "NCK hardware fault: Watchdog timeout."
In some cases, the hardware is fine, but the HMI configuration files (such as NETNAMES.INI sinumerik 810d waiting for nck connection
controller on the vertical machining centre stared back with a cold, persistent message scrolling across the screen: "Waiting for NCK connection." She swapped it with a known-good spare from