use of the CMOS/BIOS settings can cause your machine
to stop working. If you are unsure it is advisable
to get professional help before you make any changes
to the BIOS.
What does BIOS Stand for?
Bios stands for Basic Input/Output System
What does the Bios do?
Every computer with a motherboard includes a special
chip referred to as the BIOS or ROM BIOS (Read Only
Memory Basic Input Output System). The BIOS includes
instructions on how to load basic computer hardware.
The BIOS also includes a test referred to as a POST
(Power On Self Test) which will ensure that the computer
meets requirements to boot up properly. If the computer
does not pass the POST you will receive a combination
of beeps indicating what is malfunctioning within
The BIOS usually has 4 main functions:
POST - Test computer hardware insuring hardware is
properly functioning before starting process of loading
Bootstrap Loader - Process of locating the operating
system. If capable Operating system located BIOS will
pass the control to it.
BIOS - Software / Drivers which interfaces between
the operating system and your hardware. When running
DOS or Windows you are using complete BIOS support.
CMOS Setup - Configuration program. Which
allows you to configure hardware settings including
system settings such as computer passwords, time,
Can I upgrade my Bios?
Most BIOS's are specifically designed for a motherboard
and its chipset. You can upgrade
your BIOS for a newer version but only with
a bios specifically designed for your motherboard
manufacturer & chipset.
When booting the computer I get a series of beeps,
what are they?
This could be one of the following reasons why
these beeps happen.
1. The Keyboard has a stuck key
2. The Computer
has a password
3. System Intruder Alarm
4. The Computer does not pass POST
The keyboard has a stuck key then try the following:
Turn off the computer and temporarily
disconnect the computer keyboard and turn on the computer.
If the beeping does not occur when the computer keyboard
is disconnected it is likely that a key is stuck or
that the keyboard is bad. Slapping the back of a keyboard
to dislodge any dust dirt or hair may help ensure
there are no stuck keys on the keyboard.
The Computer has a Password.
Some computers have the capability of having a BIOS
keyboard password. This password will sometimes cause
the computer to beep and the keyboard not to work.
To determine if this is the case look at the keyboard
LEDs (Num Lock / Caps Lock / Scroll Lock) if these
are flashing continuously the computer has a password.
To clear a password known or unknown then try this
help section on clearing
The Computer has a System Intruder Alarm.
A beeping or buzzing tone can also be caused by the
system intruder alarm when the system case is removed.
Verify that the beeping or buzzing noise does not
also occur when the computer is off. If this is the
case attempt to remove and cover of the case and then
put the case back on.
The Computer does not pass POST, which is the most
likely possibility then try the following:
When the computer fails this test it will sound a
'Beep Code' indicating what caused it to not pass
Try the following list for details.
Click here for a
list of Bios Beep codes for Award and AMI BIOS
What is the BIOS Agent ?
The BIOS Agent is a simple, easy to use program that
will automatically identify your computers BIOS information.
You'll quickly identify the BIOS Date, BIOS Type,
BIOS ID String, Motherboard OEM data, Motherboard
Chipset and Super I/O data. This information is very
helpful in the event you need or want to upgrade the
BIOS on your PC.