System BIOS performs & tests POST.System BIOS loads and execute video’s BIOS.
System BIOS tests & looks for other devices’ BIOS such as HDD.
System BIOS displays start-up screen.
System BIOS performs and tests configuration on Hardware.
System BIOS displays summary screen.
System BIOS searches for boot drive and looks for boot information.
(If no boot device was found, an error message will be displayed.)
System BIOS starts the process of booting the operating system (OS).
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