9 Remove the palm-rest assembly (see "Removing the Palm-Rest Assembly" on page 31). 10 Remove the thermal fan (see "Removing the Thermal Fan" on page 49). 11 Loosen the display cable grounding screw. 12 Disconnect the display cable and speakers cable from the connectors on the system board. 13 Remove the five screws that secure the system board to the computer base. System Board 1 2 3 1 display cable connector 2 display cable grounding screw 3 speakers cable connector 14 Lift the system board assembly to disconnect the connector on the system board from the connector on the I/O board. System Board 1 1 system board 15 Turn the system board over. 16 Remove the coin-cell battery (see "Removing the Coin-Cell Battery" on page 87). 17 Follow the instructions from step 3 to step 5 in "Removing the Hard-Drive Assembly" on page 95. 18 Remove the thermal cooling assembly (see "Removing the Thermal Cooling Assembly" on page 89. 19 Remove the processor module (see "Removing the Processor Module" on page 91). System Board Replacing the System Board 1 Follow the instructions in "Before You Begin" on page 9. 2 Replace the processor module (see "Replacing the Processor Module" on page 92). 3 Replace the thermal cooling assembly (see "Replacing the Thermal Cooling Assembly" on page 90. 4 Follow the instructions from step 5 to step 7 in "Replacing the Hard-Drive Assembly" on page 97. 5 Replace the coin-cell battery (see "Replacing the Coin-Cell Battery" on page 88). 6 Turn the system board over. 7 Align the connectors on the system board with the slots on the computer base and place it in position. 8 Gently press the system board to connect the connector on the system board to the connector on the I/O board. 9 Replace the five screws that secure the system board to the computer base. 10 Connect the display cable and speakers cable to the connectors on the system board. 11 Tighten the display cable grounding screw. 12 Replace the thermal fan (see "Replacing the Thermal Fan" on page 50). 13 Replace the palm-rest assembly (see "Replacing the Palm-Rest Assembly" on page 35). 14 Replace the keyboard (see "Replacing the Keyboard" on page 29). 15 Connect the AC-adapter connector cable to the connector on the system board. 16 Follow the instructions from step 4 to step 5 in "Replacing the Optical Drive" on page 21. 17 Replace the memory module(s) (see "Replacing the Memory Module(s)" on page 24). 18 Replace the module cover (see "Replacing the Module Cover" on page 18). 19 Replace the battery (see "Replacing the Battery" on page 16). System Board 20 Replace any cards or blanks removed from the 8-in-1 media card reader. CAUTION: Before turning on the computer, replace all screws and ensure that no stray screws remain inside the computer. Failure to do so may result in damage to the computer. 21 Turn on the computer. NOTE: After you have replaced the system board, enter the computer Service Tag in the BIOS of the replacement system board. 22 Enter the service tag (see "Entering the Service Tag in the BIOS" on page 82). Entering the Service Tag in the BIOS 1 Ensure that the AC adapter is plugged in and that the main battery is installed properly. 2 Turn on the computer. 3 Press as soon as you see the Dell logo to enter the system setup program. 4 Navigate to the security tab and enter the service tag in the Set Service Tag field. System Board 18 Speakers WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best practices information, see the Regulatory Compliance Homepage at dell.com/regulatory_compliance. CAUTION: To avoid electrostatic discharge, ground yourself by using a wrist grounding strap or by periodically touching an unpainted metal surface (such as a connector on your computer). CAUTION: Only a certified service technician should perform repairs on your computer. Damage due to servicing that is not authorized by Dell is not covered by your warranty. CAUTION: To help prevent damage to the system board, remove the main battery (see "Removing the Battery" on page 15) before working inside the computer. Removing the Speakers 1 Follow the instructions in "Before You Begin" on page 9. 2 Follow the instructions from step 2 to step 14 in "Removing the System Board" on page 77. 3 Note the speakers cable routing and lift the left and right speakers along with the its cable from the computer base. Speakers 1 2 1 speakers (2) 2 speakers cable Replacing the Speakers 1 Follow the instructions in "Before You Begin" on page 9. 2 Place the speakers on the computer base and route the speakers cable through the routing guides. 3 Follow the instructions from step 7 to step 20 in "Replacing the System Board" on page 81. Speakers CAUTION: Before turning on the computer, replace all screws and ensure that no stray screws remain inside the computer. Failure to do so may result in damage to the computer. Speakers 86 Speakers 19 Coin-Cell Battery WARNING: Before working ...