Universal motherboard internal speaker, commonly used for PC bios beep code diagnostics.
The computer POST (power-on self-test) checks a computer's internal hardware for compatibility and connection before starting the remainder of the boot process.
If the computer passes the POST, the computer may give a single beep (some computers may beep twice) as it starts and continues to boot.
However, if the computer fails the POST, the computer doesn't beep or generates a beep code telling the user the source of the problem.
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