A technician is asked to troubleshoot a hardware alert on a server. The server is up and running and all users can access their data. Which of the following could the technician use to find the…

Status LEDs on server components such as hard drives, power supplies, and NIC ports use color codes and blinking patterns to visually indicate component health and fault conditions. Because these are hardware-level indicators driven by the server's firmware, they can identify a failed component while the server remains fully operational and accessible to users.

A dataflow diagram illustrates how data moves through an application or system architecture and contains no information about physical hardware component status or failures.

A power supply tester requires the power supply unit to be physically removed from the server for bench testing, which would be disruptive and impractical while the server is actively running.

LCD panels integrated into rack servers display real-time error and alert codes generated by the server's baseboard management controller or firmware in response to hardware events. These messages identify the specific component that triggered the alert, enabling the technician to locate the failed hardware without interrupting server operations.

A cabling diagram shows the physical or logical layout of cables and connections but does not provide any indication of internal hardware component failures or alerts.