A desktop PC fails to boot. When it is powered on, the system speaker emits three short beeps and nothing appears on the monitor. According to common BIOS POST codes, which component is MOST likely at fault?
Power supply
Hard drive
CPU
RAM
In many AMI/Award BIOS implementations, three short beeps indicate a memory (RAM) read/write failure. Re-seating or replacing the system RAM is therefore the first troubleshooting step. The CPU, hard drive, and power supply can cause boot problems, but they generate different beep or LED codes.
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