Dell Dimension L Series, Справочное и ремонтное руководство

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support.dell.com Installing Upgrades on the System Board 2-9
Jumpers
Jumpers are small blocks on the system board with two or more pins emerging from
them. Plastic plugs containing a wire fit down over the pins, creating a circuit. To
change a jumper setting, pull the plug off its pin(s) and carefully fit it down onto the
pin(s) indicated.
The jumper setting is often shown in text as two numbers, such as 1–2 . The number 1
is printed on the circuit board so that you can identify each pin number based on the
location of pin 1.
Figure 2- 2-5 shows the location of the system-board configuration jumper in your com-
puter. Table 2-2 describes the settings and functions of the configuration jumper.
Table 2-2. Configuration Jumper Settings
Jumper
Settings*
Description
Normal mode In Normal mode (jumper on pins 1–2), system setup settings and
installed password(s) are retained when the system boots. In this
mode, an automatic recovery is attempted if the BIOS detects
S detects
that any of its main blocks are corrupted.
Maintenance
mode Starting the system in Maintenance mode (jumper on pins 2–3)
automatically starts the system setup program, adds the
Mainte-
nance option to the menu bar, and displays the Maintenance
screen. The Maintenance screen provides the Clear All Pass-
words option, which allows you to disable a forgotten password which allows you to disable a forgotten password
(refer to “Disabling a Forgotten Password” in Appendix B).
NOTICE: Entering Maintenance mode returns all settings
in the system setup program to their defaults. Dell
strongly recommends that you record or print all current
settings before entering Maintenance mode so that you
can correct them when the system is reset to Normal
mode.
* •
indicates pin 1
NOTE: The Glossary in the system Help defines abbreviations and acronyms.