What makes a PC beep like a metronome?

A PC may beep like a metronome due to a hardware issue, often related to the motherboard or RAM. This rhythmic beeping can indicate a problem such as a failed component, improper seating of RAM or expansion cards, or overheating. The beeping pattern varies depending on the BiOS manufacturer, so consulting the motherboard's manual can help identify the specific issue. Additionally, the beeping may occur if the system is in a state where it cannot complete the boot process.