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48 Re mov i ng and Re placing Pa rt s 3 Update the BIOS using a flash BIOS update program diskette or CD. NOTE: For instructions to update or flash the BIOS, see the Del ll PortableComputer BIOSUpdateGuide. Reserve Battery NOTICE: The reserve battery provides power to the computer’s RTC and NVRAM when the computer is turned off. Removing the battery causes the computer to lose the date and time information as well as all user-specified parameters in the BIOS. If possible, make a copy of this information before you remove the reserve battery. Removing the Reserve Battery NOTICE: Disconnect the computer and any attached devices from electrical outlets, and remove any installed batteries. NOTICE: To avoid ESD, ground yourself by using a wrist grounding strap or by touching an unpainted metal surface on the computer. NOTICE: Read "Preparing to Work Inside the Computer" before performing the following procedure. Re s e r v e B a t t e r y reserve battery reserve battery connector reserve battery cable Removing and Replacing Parts w w w. d e ll .co m | s u p p o r t . d e l l.c o m 1 Remove the hard drive. 2 Remove the memory module cover. 3 Disconnect the reserve battery cable from the connector on the system board assembly located next to the reserve battery. NOTE: If the reserve battery is not located on the EMI shield as shown in “Reserve Battery,” contact Dell technical support. 4 Remove the reserve battery from the EMI shield: a Pry the reserve battery free from the foam pad. b Remove the remnants of the foam pad from the EMI shield. Replacing the Reserve Battery 1 Connect the reserve battery cable to the connector on the system board. 2 Position the reserve battery on the EMI shield next to the connector to minimize slack in the cable. 3 Update the BIOS using a flash BIOS update program diskette or CD. NOTE: For instructions to update or flash the BIOS, see the Del ll PortableComputerBIOS UpdateGuide. Speaker Assemblies The speakers are located on the front left and right sides of the bottom case assembly. Each speaker assembly is marked with a right or left label. Take note of the speaker cable routing in the bottom case assembly so you can replace it correctly. 50 Removing and Replacing Parts Ro ut ing t h e L e f t Speake r Cable Removing the Speaker Assemblies NOTICE: Disconnect the computer and any attached devices from electrical outlets, and remove any installed batteries. NOTICE: To avoid ESD, ground yourself by touching an unpainted metal surface or by using a wrist grounding strap. NOTICE: Read "Preparing to Work Inside the Computer" before performing the following procedure. NOTICE: Make note of the speaker and antenna wire routing so you can replace them properly under their routing clips. Re moving an d Re pl ac i ng Pa r t s w w w . d e ll .co m | s u p p o r t . d e l l.c o m Speaker Assemblies in-line connector left speaker right speaker right speaker holder left speaker holder antenna cable antenna cable mounting ring mounting ring 52 Re mov i ng and Re placing Pa rt s 1 Remove the hard drive. 2 Remove the keyboard assembly. 3 Remove the display assembly. 4 Remove the palmrest assembly. 5 Disconnect the speaker interface cable connectors. NOTICE: Do not pull the antenna cable when removing the speaker (see “Speaker Assemblies”). 6 Remove the speaker assemblies by pulling them straight up and out of the bottom case assembly NOTICE: Handle the speaker assemblies and speakers with care to avoid damaging the speaker cones. NOTE: The left speaker has an in-line connector, and its cable is longer than the right speaker. Replacing the Speaker Assembly 1 To replace the speaker assembly, place the mounting ring over the front palmrest screw post. NOTICE: Make sure the speaker wires are under their routing clips. Route the left speaker wire properly between the battery bay and hard drive area. 2 Slide the speaker assembly down in to the bottom case assembly. NOTE: Speakers face out in the bottom case assembly holders. System Board Assembly The system board’s BIOS chip contains the system’s service tag number, which is also visible on a bar-code label on the bottom of the computer. The replacement kit for the system board assembly includes a CD that provides a utility for transferring the service tag number to the replacement system board assembly. Re moving an d Re pl ac i ng Pa r t s w w w . d e ll .co m | s u p p o r t . d e l l.c o m Re mo ving t h e Sys t em B o a r d A s s e m b ly Scr e w s M2.5 x 5-mm screws (9) fan guard outlets, and remove any installed batteries. NOTICE: To avoid ESD, ground yourself by using a wrist grounding strap or by periodically touching an unpainted metal on the computer. NOTICE: Read "Preparing to Work Inside the Computer" before performing the following procedure. 1 Remove the hard drive. 2 Remove the keyboard assembly. 3 Remove the display assembly. 4 Remove the palmrest assembly. 5 Remove the thermal cooling assembly. 6 Remove the microprocessor. 7 Verify that a...