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Overview | ||
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Jumpers—A General Explanation | ||
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System Board Jumpers |
This section provides specific information about the jumpers on the system board. It also provides some basic information on jumpers and switches and describes the connectors and sockets on the various boards in the system.
Jumpers provide a convenient and reversible way of reconfiguring the circuitry on a printed circuit board. When installing replacement parts or reconfiguring the system, you may need to change jumper settings on the system board. You may also need to change jumper and/or switch settings on expansion cards or drives.
To change a jumper setting, pull the plug off its pin(s) and carefully fit it down onto the pin(s) indicated.
NOTICE: Make sure the system is turned off before you change a jumper setting. Otherwise, damage to the system or unpredictable results may occur.
A jumper is referred to as open or unjumpered when the plug is pushed down over only one pin or if there is no plug at all. When the plug is pushed down over two pins, the jumper is referred to as jumpered. 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 1 shows the location of the configuration jumpers on the system board. Table 1 lists the function of these jumpers.
Figure 1. System Board Jumpers
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Table 1. System Board Jumper Settings
| Jumper | Setting | Description | |
|---|---|---|---|
| BIOS CONFIG |
|
(default) | Normal
setting (on pins 1 and 2). Recovery position (CMOS clear) (on pins 2 and 3) |
| PASSWORD CLEAR |
 |
(default) |
The
password clear feature has cleared the password. The password feature is enabled. |
 jumpered
 unjumpered |
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