A technician is asked to troubleshoot a server that constantly reboots. There are no error messages displayed on the server. Which of the following should the technician check?

When a server overheats due to a cooling failure such as a failed fan or blocked airflow, the onboard thermal protection immediately forces a hardware-level shutdown and restart cycle to prevent permanent damage. Because this interrupt occurs below the OS layer, no software-generated error messages are ever displayed.

A cable mismatch causes data transfer or connectivity errors and would not produce a continuous hardware-level reboot loop with no error output.

A BIOS driver failure would typically manifest as visible POST error codes or audible beep codes rather than a silent, repeated reboot cycle.

A port conflict is a software or network configuration issue that results in service errors or connectivity failures, not in repeated unsolicited system restarts.