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CAUTION: A CAUTION indicates a potential for property damage, personal injury, or death. Back to Contents Page Battery Dell Precision™ R5400 Service Manual Replacing the Battery The computer battery is a 3.0-V, coin-cell battery. Replacing the Battery 1. Perform the steps in Before Working on Your Computer. 2. Remove the battery. a. Support the battery connector by pressing down firmly on the positive side of the connector. b. While supporting the battery connector, press the battery toward the positive side of the connector and pry it up out of the securing tabs at the negative side of the connector. 3. Install the new battery. a. Support the battery connector by pressing down firmly on the positive side of the connector. b. Hold the battery with the "+" facing up, and slide it under the securing tabs at the positive side of the connector. c. Press the battery straight down into the connector until it snaps into place. 4. Replace the computer cover (see Replacing the Cover). 5. Reconnect the computer to its electrical outlet and turn the computer on, including any attached peripherals. 6. Enter the system setup program to confirm that the battery is operating properly (see the Dell Technology Guide for information about accessing and using the system setup program). 7. Enter the correct time and date in the system setup program's Time and Date fields. 8. Exit the system setup program. CAUTION: Only trained service technicians are authorized to remove the computer cover and access any of the components inside the computer. Before working inside the computer, read the safety information that shipped with the computer. For additional safety best practices information, see the Regulatory Compliance Homepage at CAUTION: There is a danger of a new battery exploding if it is incorrectly installed. Replace the battery only with the same or equivalent type recommended by the manufacturer. Discard used batteries according to the manufacturer's instructions. See the safety information that shipped with the computer for additional information. NOTICE: If you pry the battery out of its socket with a blunt tool, be careful not to touch the system board with the object. Ensure that the object is inserted between the battery and the socket before you attempt to pry out the battery. Otherwise, you may damage the system board by prying off the socket or by breaking circuit traces on the system board. NOTICE: To avoid damage to the battery connector, you must firmly support the connector while installing or removing a battery. 1 positive side of battery connector 2 battery 3 negative side of battery connector NOTICE: To avoid damage to the battery connector, you must firmly support the connector while installing or removing a battery. 9. To test the newly installed battery, turn off the computer and disconnect it from the electrical outlet for at least an hour. 10. After an hour, reconnect the computer to its electrical outlet and turn it on. 11. Enter the system setup program and if the time and date are still incorrect, see Contacting Dell for instructions on obtaining technical assistance. Back to Contents Page Back to Contents Page Before Working on Your Computer Dell Precision™ R5400 Service Manual Recommended Tools What You Need to Know For Your Safety This document provides procedures for removing and installing components in your computer. Unless otherwise noted, each procedure assumes that: l You have performed the steps in this section. l You have read the safety information that shipped with your computer. l When replacing a component, you have already removed the original, if installed. Recommended Tools The procedures in this document may require the following tools: l Small flat-blade screwdriver l Phillips screwdriver l Small plastic scribe l Flash BIOS update (see the Dell Support website at support.dell.com) What You Need to Know For Your Safety Use the following safety guidelines to help protect your computer from potential damage and to help ensure your own personal safety. 1. Shut down your computer. l In Microsoft Windows Vista®, click Start , click the arrow icon, and then click Shut Down to turn off your computer. l In Microsoft® Windows® XP, click Start® Shutdown® Shutdown. 2. Disconnect your computer and all attached devices from their electrical outlets. 3. Disconnect any network cables from the computer. 4. If applicable, remove the computer from the rack (see the Rack Installation Guide for instructions). CAUTION: Only trained service technicians are authorized to remove the computer cover and access any of the components inside the computer. Before working inside the computer, read the safety information that shipped with the computer. For additional safety best practices information, see the Regulatory Compliance Homepage at NOTE: The color of your computer and certain components may appear differently than shown in this doc...