ASUS A6421 User Manual

ASUS All-in-One PC

51

BIOS (Basic Input and Output System) stores system hardware settings 

that are needed for system startup in the ASUS All-in-One PC. 

In normal circumstances, the default BIOS settings apply to most 

conditions to ensure optimal performance. Do not change the default 

BIOS settings except in the following circumstances: 

•

An error message appears on the screen during the system

bootup and requests you to run the BIOS Setup.

•

You have installed a new system component that requires further

BIOS settings or update.

WARNING! Inappropriate BIOS settings may result to instability or boot 

failure. We strongly recommend that you change the BIOS settings only 

with the help of a trained service personnel.

To access the BIOS:

•

Press the power button to turn on your ASUS All-in-One PC then

press <F2> or <Del> during POST.

NOTE: POST (Power-On Self-Test) is a series of software controlled 

diagnostic tests that run when you turn on your ASUS All-in-One PC.