Compaq 270680-003 Compaq Reference Guide Deskpro 4000 and Deskpro 6000 Series - Page 227

Recording Hard Drive Parameters G appendix INSTALLING A NEW BATTERY When your computer no longer automatically displays the correct date and time, it may mean the battery providing power to the real-time clock needs to be replaced. Battery life is usually about five years. Before replacing the battery in a personal computer, perform the steps in "Recording Hard Drive Parameters" and "Preparing the Computer for Installation." Computer Setup automatically detects and configures most Compaq components, including Compaq hard drives. If the machine you are servicing has a Compaq hard drive, go to the next section, "Preparing the Computer for Installation." If the computer being serviced has a third-party hard drive, you must complete the following steps before installing the battery: 1. Run Computer Setup and record the drive type displayed in the System Configuration Summary. 2. If the drive type number is 65 or 66, record the drive parameters. Drives with these designators are user-defined types, also called soft-drive types. Whenever the nonvolatile memory (CMOS) has become invalid, such as after the installation of a new battery, drive parameters must be entered manually for these user-defined drives. 3. After you have completed the battery installation, run Computer Setup and use the drive table parameters recorded earlier to reconfigure the system.  Drive parameters must be reentered after battery installation in order to reconfigure the hard drive. The hard drive is inoperable until this is done. Reference Guide G-1