Dell Precision T3400 User's Guide - Page 261

2 Set the jumpers on the replacement system board so that they are identical to the ones on the existing board (see "System Board Components" on page 148). NOTE: Some components and connectors on the replacement system board may be in different locations than the corresponding connectors on the existing system board. 3 Orient the replacement board by aligning the notches on the bottom of the board with the tabs on the computer. 4 Slide the system board assembly toward the back of the computer until the assembly clicks into position. 5 Replace any components and cables that you removed from the system board. 6 Reconnect all cables to their connectors at the back of the computer. 7 Replace the computer cover (see "Replacing the Computer Cover" on page 262). NOTICE: To connect a network cable, first plug the cable into the network port or device and then plug it into the computer. 8 Connect your computer and devices to electrical outlets, and turn them on. Replacing the Front Panel CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide. CAUTION: To guard against electrical shock, always unplug your computer from the electrical outlet before opening the cover. NOTICE: To prevent static damage to components inside your computer, discharge static electricity from your body before you touch any of your computer's electronic components. You can do so by touching an unpainted metal surface on the computer. 1 Align the notches on the front panel with the corresponding holes on the front of the computer. 2 Pull the front-panel release lever, and slide the panel to the right to engage and secure the front panel. Adding and Replacing Parts 261