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Dell™ Latitude™ C400 Service Manual
Before You Begin
System Components
Keyboard
Memory Module and Modem Daughter Card
Hard Drive
Wireless Network Adapter
Display Assembly and Display Latch
Palm Rest
Cooling Fan
Reserve Battery
Flashing the BIOS
Audio Board
System Board
Battery Latch
Pin Assignments for I/O Connectors
Notes, Notices, and Cautions
NOTE: A NOTE indicates important information that helps you make better use of your computer.
NOTICE: A NOTICE indicates either potential damage to hard
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Back to Contents Page Before You Begin Dell™ Latitude™ C400 Service Manual Preparing to Work Inside the Computer Recommended Tools Screw Identification Preparing to Work Inside the Computer NOTICE: 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. NOTICE: To avoid damaging the computer, perform the following steps before you begin working inside the computer. 1. Make sure that
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5-mm nut driver 7-mm nut driver Needle-nose pliers Flash BIOS update program floppy disk or CD Computer Orientation 1 back 2 right 3 front 4 left Screw Identification When you are removing and replacing components, photocopy the placemat as a tool to lay out and keep track of the screws. The placemat provides the number of screws and their sizes. Screw Identification NOTICE: When reinstalling a screw, you must use a screw of the correct diameter and length. Make sure that the screw is proper
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Hard Drive Door: Modem Daughter Card: (1 each) (1 each) Keyboard: Display Assembly: (4 each) Display Bezel: Palm Rest to Bottom Case: (6 each) Rubber screw covers: 6 each Critical Component Shield: Palm Rest to System Board: (6 each) (6 each) Cooling Fan: Audio Board: (3 each) (2 each)
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System Board: (1 each) Guide pins: 2 each 5-mm hex nuts: 4 each 7-mm hex nuts: 2 each Back to Contents Page
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Back to Contents Page System Components Dell™ Latitude™ C400 Service Manual NOTICE: 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. NOTICE: Unless otherwise noted, each procedure in this manual assumes that a part can be replaced by performing the removal procedure in reverse order. System Components 1 display 8 memory module/modem cover 2 center cover 9 battery 3 hard drive 10 au
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Back to Contents Page
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Back to Contents Page Keyboard Dell™ Latitude™ C400 Service Manual Removing the Keyboard Replacing the Keyboard Removing the Keyboard 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. . 1. Remove the h
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row or two of keycaps, and press on the straightedge instead of on the keycaps themselves. c. Insert a flat-blade screwdriver into the slot. While holding the screwdriver, make your hand into a fist, brace your knuckles against the keyboard, and pry up the center cover. d. Repeat steps b and c for the right release slot, located behind the and keys. e. Lift the center cover up and away from the bottom case. 3. Remove the four M2 x 4-mm screws that secure the back edge of the keyboa
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1 keyboard flex cable 6. Use the pull tab to pull the keyboard flex cable up from its connector on the system board. The keyboard is now disconnected from the bottom case. Replacing the Keyboard 1. Replace the hard drive. 2. Place the keyboard face-down on the palm rest, with the keyboard flex cable pointing toward the back of the computer. NOTICE: To avoid damage to the connector pins, press the keyboard flex cable connector evenly into the interface connector on the system board, and do not
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1 keyboard securing tabs (5) 4. Carefully rotate the keyboard back and fit it into the bottom case. Ensure that all five securing tabs are engaged in their respective slots before trying to completely seat the keyboard. Fitting the tabs to the slots may be easiest when viewed from above and slightly behind the front edge of the keyboard. Press down on the left and right keys to help control tab/slot alignment. When the keyboard appears to be completely seated, confirm that the front edge
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Back to Contents Page Memory Module and Modem Daughter Card Dell™ Latitude™ C400 Service Manual Removing the Memory Module/Modem Cover Removing the Memory Modules Replacing the Memory Modules Removing the Modem Daughter Card Replacing the Modem Daughter Card Removing the Memory Module/Modem Cover NOTE: This procedure covers removing and replacing the memory module located under the memory module/modem cover on the bottom of the computer. A second memory module resides on the upper surf
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Removing the Memory Modules NOTICE: Disconnect the computer and any attached devices from electrical outlets, and remove the battery. 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. 1. Remove the memory module/modem cover. NOTICE: To prevent damage to the memory module connector, do not use tools to spread the inner met
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NOTICE: The memory module must be inserted at a 45-degree angle to avoid damaging the connector. 1. Align the notch in the memory module with the slot in the center of the socket. 2. Slide the edge connector of the module firmly into the socket at a 45- degree angle, and rotate the module down until you hear a click. If you do not hear the click, remove the module and reinstall it. 3. Replace the cover and tighten the two captive screws. Removing the Modem Daughter Card NOTICE: Disconnect the
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2 pull tab 3 boss 4 modem connector 5 modem cable Replacing the Modem Daughter Card 1. Connect the modem cable to the modem daughter card. NOTICE: The connectors are keyed for correct insertion; do not force the connections. 2. Using the screw hole and the boss at the opposite corner of the daughter card to align the card, press the card into its connector on the system board. 3. Install the M2 x 4-mm screw that secures the modem to the system board. 4. Replace the memory module/modem cover a
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Back to Contents Page Hard Drive Dell™ Latitude™ C400 Service Manual Removing the Hard Drive Replacing the Hard Drive Removing the Hard Drive 1. Save and close any open files, exit any open programs, and shut down the computer. NOTICE: Disconnect the computer and any attached devices from electrical outlets, and remove the battery. NOTICE: The hard drive is very sensitive to shock. Handle the hard drive by its edges (do not squeeze the top of the hard drive case), and avoid dropping it. NOT
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4. Slide the hard drive straight out of the computer. Replacing the Hard Drive NOTICE: Use firm and even pressure to slide the hard drive into place. If you force the hard drive into place using excessive force, you may damage the connector. 1. Push the hard drive into the drive bay until it is fully seated in the bay. 2. Replace the M2.5 x 12-mm screw in the hard drive door. Back to Contents Page
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Back to Contents Page Wireless Network Adapter Dell™ Latitude™ C400 Service Manual Removing the Wireless Network Adapter Replacing the Wireless Network Adapter Removing the Wireless Network Adapter 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 Compute
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down into place. Back to Contents Page
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Back to Contents Page Display Assembly and Display Latch Dell™ Latitude™ C400 Service Manual Removing the Display Assembly Replacing the Display Latch Removing the Display Assembly NOTICE: You must remove the display assembly before you remove the palm rest. 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
