POST beep codes are designed to communicate the status of the system when visual output is not available. A single short beep typically signifies a successful POST, meaning all hardware is functioning correctly and not a system board error. Each manufacturer may have different beep codes, so it's important for technicians to reference the motherboard's manual for the correct interpretation. Some POST beep patterns are indeed indicative of problems, but a single short beep is generally a sign of a healthy system.