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Chapter 3: BIOS Utilities
Power On Self Test (POST)
The system BIOS (Basic Input/Output System) performs a series of Power On Self
Test (POST) on system memory and key computer components every time the
computer is powered on. If an error exists, the POST routine may halt execution
(depending on the severity of the problem). POST also initializes BIOS configuration
then boots the operating system.
POST: Normal Operation
If no error occurs, the BIOS will begin to boot.
POST: Error Detected
If an error is detected before the display device is initialized, a series of audible beeps
will be emitted to indicate that a fatal error has occurred. Fatal errors do not allow the
computer to continue the boot process.
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