Before You Begin

Dell™ XPS M140 Service Manual

Preparing to Work Inside the Computer

CAUTION: Before you perform any of the procedures in this section, follow the safety instructions in the Product Information Guide.

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 electrostatic discharge, ground yourself by using a wrist grounding strap or by periodically touching an unpainted metal surface (such as the back panel) on the computer.

NOTICE: Handle components and cards with care. Do not touch the components or contacts on a card. Instead, hold a card by its edges or by its metal mounting bracket. Hold a component such as a microprocessor by its edges, not by its pins.

NOTICE: When disconnecting a cable, pull on the cable's connector or on its strain-relief loop, not on the cable itself. Some cables have connectors with locking tabs; before disconnecting this type of cable, press inward on the locking tabs to release the connector. When connecting or disconnecting a cable, ensure that the connectors are correctly oriented and aligned to avoid damage to the connector and/or the connector's pins.

NOTICE: To avoid damaging the computer, always perform the following steps before you begin working inside the computer.

Ensure that the work surface is flat and clean to prevent scratching the computer cover.
Save any work in progress and exit all open programs.
Turn off the computer and all attached devices.

NOTE: Ensure that the computer is off and not in a power management mode. If you cannot shut down the computer using the operating system, press and hold the power button for 4 seconds.

Disconnect the computer from the electrical outlet.

NOTICE: To avoid damaging the system board, wait 10 to 20 seconds before disconnecting any attached devices.

Disconnect all attached devices.
Disconnect all external cables from the computer.
Close the display and turn the computer upside down on a flat work surface.

NOTICE: To avoid damaging the system board, you must remove the main battery before servicing the computer.

Slide and hold the battery bay latch release on the bottom of the computer, then pull the battery out of the battery bay.

1

battery

2

battery bay latch release

Recommended Tools

The procedures in this document will require one or more of the following tools:

Small flat-blade screwdriver
Phillips screwdriver
Small plastic scribe
Flash BIOS update (see the Dell support website at support.dell.com)

Computer Orientation

1

front

2

left

3

back

4

right

Screw Identification

The following chart provides the number of screws used to secure the various system components and their corresponding sizes. When removing and replacing components, print the screw identification chart as a placemat to lay out and keep track of the screws.

Optical Drive:

(1 each – optional)

Modem:

(1 each)

Bluetooth Module:

(1 each)

Hinge Cover:

(2 each)

Display Assembly:

(4 each)

Display Bezel (screw):

(6 each)

Display Bezel (rubber bumper):

(6 each)

Display Panel:

(6 each)

Palm Rest (top):

(4 each)

Palm Rest (bottom):

(11 each)

Fan:

(3 each)

Speakers:

(3 total)

System Board (top):

(1 each)

System Board (bottom):

(2 each)

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