Dell Vostro 220 (Late 2008) - Manual (Page 135)

Safety Instructions
135
4 Remove the 2-pin jumper plug from pins 2 and 3 and fix it on pins 1 and 2.
5 Wait for approximately five seconds to clear the password.
6 Remove the 2-pin jumper plug from pins 1 and 2 and replace it on pins 2
and 3 to enable the password feature.
7 Follow the procedure in "After Working on Your Computer" on page 45.
Clearing CMOS Settings
CAUTION:
Before working inside your computer, read the safety information that
shipped with your computer. For additional safety best practices information, see
the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance
1 Follow the procedures in "Before Working on Your Computer" on page 35.
NOTE:
The computer must be disconnected from the electrical outlet to clear
the CMOS setting.
2 Remove the computer cover (see "Removing the Computer Cover" on
page 47).
3 Reset the current CMOS settings:
a Locate the 3-pin CMOS jumper (CLEAR CMOS) on the system
board (see "System Board Components" on page 40).
b Remove the jumper plug from the CMOS jumper (CLEAR CMOS)
pins 2 and 3.
c Place the jumper plug on the CMOS jumper (CLEAR CMOS) pins 1
and 2 and wait approximately five seconds.
d Remove the jumper plug and replace it on the CMOS jumper
(CLEAR CMOS) pins 2 and 3.
4 Follow the procedure in "After Working on Your Computer" on page 45.
5 Reboot your computer.
Your computer will emit five beeps, and then issue a CMOS checksum
error
.
6 Press <F1> to continue.