System board jumpersThe following illustration identifies the jumpers on the system board.CMOS jumper(JBAT1)Boot block jumper(JROM1)112233Boot block jumperFor normal operations of the system, a jumper is installed on pins 2 and 3 of theboot block jumper. See “Recovering BIOS” on page 99 for information about theboot block jumper.CMOS jumperFor normal operation of the system, a jumper is installed on pins 1 and 2 of theCMOS jumper. See “Clearing CMOS” on page 103 for information about the CMOSjumper.Before you beginBefore you begin to install options in your computer, read the followinginformation.v Become familiar with the safety and handling guidelines specified under“Handling static-sensitive devices” on page 38, and read the safety statements in“Safety information” on page 39. These guidelines will help you work safelywith your computer or options.v Make sure that you have an adequate number of properly grounded electricaloutlets for your computer, monitor, and any other options that you intend toinstall.v When you need to access the inside of the computer to install options, youmight find it easier to lay the computer on its side. If you do so, rotate the twofront feet in towards the computer, so they do not break off due to the weight ofthe computer.Chapter 5. Installing options 37
