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Installing and Replacing Desktop Board Components
61
Clearing or Changing Hard Disk Drive Passwords
This section describes how to clear or change User and Master hard disk drive
passwords. The procedures for clearing the passwords are as follows:
• User Hard Disk Drive Passwords:
If a valid User hard disk drive password has been entered and the user wishes to
change or delete the password, the user must first enter the existing User hard
disk drive password in BIOS Setup for security confirmation.
To delete an existing User hard disk drive password, the user can enter a blank
password for the new password.
• Master Hard Disk Drive Passwords:
If a valid Master hard disk drive password has been entered and the user wishes to
change or delete the password, the user must first enter the existing Master hard
disk drive password in BIOS Setup for security confirmation.
To delete an existing Master hard disk drive password, the user can enter a blank
password for the new password.
Replacing the Battery
A coin-cell battery (CR2032) powers the real-time clock and CMOS memory. When
the computer is not plugged into a wall socket, the battery has an estimated life of
three years. When the computer is plugged in, the standby current from the power
supply extends the life of the battery. The clock is accurate to ± 13 minutes/year at
25 ºC with 3.3 VSB applied.
When the voltage drops below a certain level, the BIOS Setup program settings stored
in CMOS RAM (for example, the date and time) might not be accurate. Replace the
battery with an equivalent one. Figure 28 on page 66 shows the location of the
battery.
CAUTION
Risk of explosion if the battery is replaced with an incorrect type. Batteries should be
recycled where possible. Disposal of used batteries must be in accordance with local
environmental regulations.
PRECAUTION
Risque d'explosion si la pile usagée est remplacée par une pile de type incorrect. Les
piles usagées doivent être recyclées dans la mesure du possible. La mise au rebut des
piles usagées doit respecter les réglementations locales en vigueur en matière de
protection de l'environnement.
FORHOLDSREGEL
Eksplosionsfare, hvis batteriet erstattes med et batteri af en forkert type. Batterier
bør om muligt genbruges. Bortskaffelse af brugte batterier bør foregå i
overensstemmelse med gældende miljølovgivning.