A server fails to boot. During POST, the technician hears one long beep and two short beeps. Which of the following should the technician reference to determine what hardware has failed?

The operating system vendor's website is not relevant because beep codes occur during the hardware POST phase, before the OS is ever involved in the boot process.

A hardware compatibility list documents which components are supported by a system but does not contain beep code definitions or POST diagnostic failure mappings.

Beep codes are generated by the BIOS during POST before any OS or software loads, and their meaning is defined by the BIOS manufacturer - such as AMI, Award, or Phoenix - embedded on that specific motherboard. The motherboard documentation includes the BIOS beep code table that maps sequences like one long and two short beeps to the specific hardware failure, making it the definitive and accurate reference.

BIOS settings is a runtime configuration interface used after POST completes and does not contain beep code reference tables or failure diagnostic documentation.