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Dell Precision M40 Service Manual

Dell precision mobile workstation m40 service manual
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Dell Precision™ Mobile Workstation M40 Service Manual 
Before You Begin
Preparing to Work Inside the Computer
Recommended Tools
Screw Identification
Removing and Replacing Parts
System Components
Hard Drive
Fixed Optical Drive
Memory Module
Mini PCI Card Assembly
Keyboard Assembly
Display and Bezel Assemblies
Microprocessor Thermal Cooling Assembly
Microprocessor Module
Video Graphics Board
Palmrest Assembly
Reserve Battery
System Board Assembly
Battery and Modular Bay Latch Assemblies
Battery Charger Board
LED Board
Fan Assembly
RJ-11/RJ-45 Board
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 hardware or loss of data and tells you how to avoid the problem.
CAUTION:
A CAUTION indicates a potential for property damage, personal injury, or death.
Information in this document is subject to change without notice. © 2001 Dell Computer Corporation. All rights reserved.
Reproduction in any manner whatsoever without the written permission of Dell Computer Corporation is strictly forbidden.
Trademarks used in this text: Dell, the DELL logo, and Dell Precision are trademarks of Dell Computer Corporation.
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. Dell Computer Corporation
disclaims any proprietary interest in trademarks and trade names other than its own.
September  2001 

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Summary of Contents for Dell Precision M40

  • Page 1 Trademarks used in this text: Dell, the DELL logo, and Dell Precision are trademarks of Dell Computer Corporation. 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. Dell Computer Corporation disclaims any proprietary interest in trademarks and trade names other than its own.

  • Page 2: Before You Begin

      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.

  • Page 3: Screw Identification

    Screw Identification When you are removing and replacing components, photocopy the placemat as a tool to lay out and keep track of the component screws.The placemat provides the number of screws and the 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 properly aligned with its corresponding hole, and avoid overtightening.
  • Page 4 Palmrest Bracket: M2.5 x 20 mm (1 each) M2.5 x 4 mm (2 each) Fan Assembly: RJ-11/RJ-45 Board Assembly: M2.0 x 4 mm (3 each) M2.5 x 4 mm (1 each) Back to Contents Page      ...

  • Page 5: Removing And Replacing Parts

    Exploded View   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.

  • Page 6: Removing The Hard Drive

    Hard Drive   Removing the Hard Drive 1.  Follow the instructions in "Preparing to Work Inside the Computer." 2.  Remove the drive door screw. 3.  Pull the hard drive out. Replacing the Hard Drive 1.  Gently push the hard drive into the drive bay until the drive door is flush with the computer case. 2.

  • Page 7: Removing The Memory Module Cover

    NOTICE: To keep the pull tab from catching on the captive screw, turn the computer over before removing the fixed optical drive. 3.  Turn the computer over, pull out the pull tab, and use the pull tab to remove the fixed optical drive. Memory Module NOTICE: Disconnect the computer and any attached devices from electrical outlets and remove any installed batteries.

  • Page 8: Replacing The Memory Modules

    3.  Lift the memory module out of its socket. Replacing the Memory Modules 1.  If you only have one memory module, install it in the socket labeled "DIMM A." Install a second memory module in the socket labeled "DIMM B." NOTE: Memory modules are keyed to fit into their sockets in only one direction.

  • Page 9: Removing The Keyboard Assembly

         3.  Pivot the Mini PCI Card assembly down until it clicks into place. 4.  Replace the Mini PCI Card assembly cover. Keyboard Assembly   NOTICE: Disconnect the computer and attached devices from electrical outlets and remove any installed batteries. NOTICE: To avoid ESD, ground yourself by using a wrist grounding strap or by periodically touching unpainted metal on the computer.

  • Page 10: Replacing The Keyboard Assembly

    Keyboard Removal   5.  Lift the right end of the keyboard and slide it slightly toward the right side of the computer to disengage the tabs at the left end. 6.  Pivot the keyboard and balance it upright on the left side of the computer. Keyboard Cable  ...

  • Page 11: Removing The Hinge Cover

        NOTICE: Disconnect the computer and attached devices from electrical outlets and remove any installed batteries. NOTICE: To avoid ESD, ground yourself by using a wrist grounding strap or by periodically touching unpainted metal on the computer. Display Assembly  ...
  • Page 12 1.  Remove the hinge cover. NOTICE: Make sure you remove the flex cable before you remove the display assembly. Flex Cable   2.  Remove the 6-mm screw that secures the display flex cable to the strain relief, and then use the pull loop to remove the display flex cable from the graphics card.

  • Page 13: Removing The Display Assembly Bezel

      Removing the Display Assembly Bezel 1.  Use a scribe to pry out the four rubber screw covers located across the top of the bezel. 2.  Remove the four 4-mm screws located across the top of the bezel. 3.  Use a scribe at the indentations to pry out the two plastic screw covers located at the bottom of the bezel. 4.

  • Page 14: Replacing The Display Panel

    Replacing the Display Panel NOTE: Use a magnetic screwdriver to reassemble the display panel in the display. 1.  Connect the flex cable to the two connectors on the back of the display panel. 2.  Place the display panel assembly in the top cover, taking care that the flex cable is in place and is not crushed or crimped. 3.

  • Page 15: Removing The Microprocessor Thermal Cooling Assembly

    Microprocessor Thermal Cooling Assembly   NOTICE: Disconnect the computer and attached devices from electrical outlets and remove any installed batteries. NOTICE: To avoid ESD, ground yourself by using a wrist grounding strap or by periodically touching unpainted metal on the computer. Retaining Clip  ...

  • Page 16: Removing The Microprocessor Module

    If you received a flash BIOS update program diskette or CD with the replacement microprocessor, you must update the BIOS after replacing the microprocessor module. For instructions on updating or reflashing the BIOS, see the Dell Portable Computer BIOS Update Guide.

  • Page 17: Video Graphics Board

    NOTICE: Proper seating of the microprocessor module does not require force. NOTICE: A microprocessor module that is not properly seated can result in an intermittent connection and subsequent failures. 1.  Align the pin-1 triangle on the microprocessor toward the pin-1 triangle in the socket, insert the microprocessor into the socket, and move it around slightly until you feel it settle into the socket.

  • Page 18: Removing The Video Graphics Board

    Removing the Video Graphics Board 1.  Follow the instructions in "Preparing to Work Inside the Computer." 2.  Remove the keyboard. 3.  Remove the hinge cover. 4.  Detach the display flex cable from the strain relief and the graphics card. 5.  Remove the three 8-mm screws that secure the video graphics board. 6.

  • Page 19: Removing The Reserve Battery

    Palmrest Screws     8.  Turn the computer over. 9.  Use the pull loop to disconnect the palmrest flex cable from the touch-pad connector on the system board. 10.  Carefully lift out the palmrest assembly. Reserve Battery NOTICE: Disconnect the computer and attached devices from electrical outlets and remove any installed batteries. NOTICE: To avoid ESD, ground yourself by using a wrist grounding strap or by periodically touching unpainted metal on the computer.

  • Page 20: Replacing The Reserve Battery

    5.  Remove the palmrest assembly. 6.  On the underside of the palmrest, disconnect the flex cable from the ZIF connector. Palmrest Flex Cable and Bracket   7.  Remove the two 4-mm screws securing the palmrest bracket. 8.  While supporting the palmrest flex cable, lift out the palmrest bracket and turn it over. 9.

  • Page 21: Removing The System Board

    If you received a flash BIOS update program diskette or CD with the replacement microprocessor, you must update the BIOS after replacing the microprocessor module. For instructions on updating or reflashing the BIOS, see the Dell Portable Computer BIOS Update Guide.

  • Page 22: Removing And Replacing The Battery And Modular Bay Latch Assemblies

    Battery and Modular Bay Latch Assemblies NOTICE: Disconnect the computer and attached devices from electrical outlets and remove any installed batteries. NOTICE: To avoid ESD, ground yourself by using a wrist grounding strap or by periodically touching unpainted metal on the computer. Battery and Modular Bay Latch Assemblies  ...

  • Page 23: Removing The Battery Charger Board

    b.  Ensure that the slider is inserted so that the side with the two bumps is facing the back of the case, and the surface with the wear ribs is facing the bottom of the case. 7.  Hold the upper latch assembly in place while you snap the new latch button in from underneath the base, making certain the snap tabs are fully engaged in the slider.

  • Page 24: Removing The Led Board

    Removing the LED Board 1.  Follow the instructions in "Preparing to Work Inside the Computer." 2.  Remove the hinge cover. 3.  Remove the two 4-mm screws. 4.  Lift the LED board away from its connector. Replacing the LED Board 1.  Align the two screw holes with the two mounting holes on the bottom case assembly, and press the board into its connector. 2.

  • Page 25: Removing The Rj-11/Rj-45 Board

    5.  Pull the fan assembly away from the back-panel bracket. NOTICE: When reconnecting the fan cables, connect the shorter cable to the connector closest to the fan assembly. Route both cables so that they will not be pinched by the thermal cooling assembly. RJ-11/RJ-45 Board NOTICE: Disconnect the computer and attached devices from electrical outlets and remove any installed batteries.
  • Page 26 RJ-11/RJ-45 Board Harness Routing   Back to Contents Page      ...

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