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Please check out our eBay auctions for more great deals on Factory Service Manuals: Reproduction in any manner whatsoever without the written permission of Dell Computer Corporation is strictly forbidden. Trademarks used in this text: Other trademarks and trade names may be used in this document to refer to either the entities claiming the marks and names or their products. 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. To avoid damaging the computer, perform the following steps before you begin working inside the computer. Close the display and turn the computer upside down on a flat work surface. To avoid damaging the system board, you must remove the main battery and secondary battery if present before you service the computer.

The placemat provides the number of screws and their sizes.

When reinstalling a screw, you must use a screw of the correct diameter and length. Ensure latituee the screw is properly aligned with its corresponding hole, and avoid overtightening. Display Panel to Top Cover: System Board to Bottom Case: Unless otherwise noted, each procedure in this document assumes that a part can be replaced by performing the removal procedure in reverse order. Save and close any open files, exit any open programs, and then shut down the computer. Disconnect the computer and any attached devices from electrical outlets, and remove any installed batteries.

Lift the hard drive door until you hear a click. Slide the hard drive out of the computer. Use firm and even delll to slide the hard drive into place. Lift the memory module out of its socket. Replacing the Memory Modules 1. Memory latjtude are keyed, or designed to fit into their sockets, in only one direction. The memory module must be inserted at a degree angle to avoid damaging the connector. To avoid ESD, ground yourself by lztitude a wrist grounding strap or by touching an unpainted metal surface on the computer.

Connect the modem cable to the modem.

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The connectors are llatitude for correct insertion; do not force the connections. Install the two M2 x 3-mm screws that secure the modem to the system board. Replace the memory module cover and tighten the two captive screws. Turn the computer over and open the display.

The keycaps on the keyboard are fragile, easily dislodged, and time- consuming to replace. Be careful when removing and handling the keyboard. Remove the center control cover: Lift the keyboard straight up about an inch and then rotate it forward toward the front of the computer, until the key face is resting on the palm rest.


Remove the keyboard from the bottom case. Replacing the Keyboard 1. Place the keyboard on the palm rest at the front of the computer with the keys face down and the connector toward the back of the computer. Carefully turn the keyboard over.

Dell Latitude C540 Service Manual

Align the keyboard boss supports, fit the left side of the keyboard into place, and then snap the right side of the keyboard into place. Position the keyboard depl and track stick cables so that they are not pinched when you replace the keyboard in the bottom case.

You must remove the display assembly before you remove the palm rest. Remove the two M2 x 3-mm screws that secure the display-feed flex cable to the system board. Pull up on the pull-tab that is attached to the display-feed flex cable connector to remove it from the interface connector on the system board.

Carefully separate the bezel from the top cover to avoid damage to the bezel. If you have a Hitachi display panel, remove the two M2 x 4-mm screws from the center of the left side of the display panel. Remove the M2 x 4-mm screw that secures the display-feed flex cable through the black plastic flex- cable retention bracket. Remove the tape that secures the display panel connector and the tape that secures the middle of the display-feed flex cable to the display panel.

Pull the top flex cable connector down and away to remove it from the display panel connector. On XGA panels, place the display latch on top of its screw holes, and then place the c504 on top of latitudd display latch, aligning the bracket and display latch screw holes. Remove the display assembly. Rotate the hinges forward at an angle of approximately 90 degrees to the front of the display assembly.

Remove the two M2 x 3-mm screws that are located in the hard-drive bay door labeled “circle P. Turn the computer over, and remove the three M2 x 3-mm screws that secure the palm rest to the bottom case: Carefully separate the palm rest from the bottom case to avoid damage to the palm rest. Microprocessor Thermal Cooling Assembly: Insert a screwdriver into the recess in the EMI shield under the front left corner of the thermal cooling assembly, and pry the assembly v540 and out of the system board.

Tighten the four captive screws, labeled 1 through 4, in consecutive order.

Back to Contents Page file: Remove the hard drive. To ensure maximum cooling for the microprocessor, do not touch the heat transfer areas on the microprocessor thermal cooling assembly. To loosen the ZIF socket, use a small, flat-blade screwdriver and latitde the ZIF-socket cam screw counter-clockwise c5400 it reaches the cam stop. The ZIF-socket cam screw secures the microprocessor to the system board. Take note of the arrow on the ZIF-socket cam screw.


Disconnect the fan power cable from the system-board interface connector and remove the hybrid cooling fan. Removing the battery causes the computer to lose the date and time information as well as all user-specified parameters in the BIOS. Connect the reserve battery cable to the reserve battery connector on the system board and then route the battery cable through the opening in the EMI shield to the battery tray. Ensure that the AC adapter is plugged in and that the main battery is installed properly.

Turn the computer over and remove the M2. Remove the speaker assemblies from the bottom case. Pull the right side of the bottom case, next to the audio connectors, away from the system board as you simultaneously lift the front of the system board out and away from the bottom case.

Replace the fan guard, inserting the tab into the bottom case, and replace the three M2. Replacing the screw opposite the tab first makes it easier to dlel and replace the other two screws. Battery and Module Bay Latches: The latch will not function properly if the slider is oriented incorrectly. Hold down the upper latch assembly and snap in the new latch release button through the bottom case, ensuring that the snap tabs are fully engaged in the upper latch assembly.

Page of 76 Go. Thank you for purchasing this Factory Service. Table of Contents Add to my manuals Add. Dell Latitude C User Manual pages. Dell system laptop pc system information guide c, c pages.

Dell laptop pc user’s guide latitude lt system pages. Page 2 Reproduction in any manner whatsoever without the written permission of Dell Computer Corporation is strictly forbidden. Recommended Tools Before You Begin: Screw Identification Before You Begin: Page 7 Before You Begin: Display Latch Before You Begin: Table Of Contents System Components: Hard Drive Patitude Drive: Page 14 Hard Drive: Removing The Keyboard Keyboard: Replacing The Keyboard Keyboard: Removing The Display Bezel Carefully separate the bezel from the top cover to avoid damage to the bezel.

Palm Rest Palm Rest: Page 40 Palm Latitide Page 41 Palm Rest: Page 42 Palm Rest: Page 44 Microprocessor Thermal Cooling Assembly: Page 45 Microprocessor Thermal Cooling Assembly: Microprocessor Module Microprocessor Module: