Jumpers
Jumpers are small blocks on a circuit board with two or more pins emerging from them.
Plastic plugs containing a wire fit down over the pins. The wire connects the pins and creates a circuit.
To change a jumper setting, pull the plug off its pin(s) and carefully fit it down onto the pin(s) indicated.
CAUTION: Make sure your system is turned off before you change a jumper setting. Otherwise, damage to your 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. In some docu- ments, the jumper setting may be shown in text as two numbers, such as
Figure 5-6 shows the location and default settings of the jumper blocks on your system board. See Table 5-1 for
the designations, default settings, and functions of your system’s jumpers.
Switches
Switches control various circuits or functions in your computer system. The switches you are most likely to encounter are dual
slide switches | rocker switches |
Each of these switches has two positions, or settings (usually on and off). To change the setting of a slide switch, use a small, pointed object such as a small screw- driver or a straightened paper clip to slide the switch to the proper position. To change the setting of a rocker switch, use the screwdriver or paper clip to press down on the appropriate side of the switch. In either case, do not use a pen, pencil, or other object that might leave a residue on the switch.
