Dell Insp 640 M Manual

							Adding and Replacing Parts121
Modem (Optional)
If you ordered the optional modem at the same time that you ordered your computer, the modem is 
already installed.
 CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product 
Information Guide.
1Follow the procedures in Before You Begin on page 109.
2Turn the computer over, loosen the captive screws on the modem/Mini-Card/wireless cover, and then 
remove the cover.
3Remove the existing modem:
aRemove the screw securing the modem to the system board, and set it aside.
bPull straight up on the attached pull-tab to lift the modem out of its connector on the system 
board, and disconnect the modem cable.
1modem/Mini-Card/wireless cover
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							122Adding and Replacing Parts
4Install the replacement modem:
aConnect the modem cable to the modem.
 NOTICE: The connectors are keyed to ensure correct insertion. If you feel resistance, check the connectors and 
realign the card. 
b
Align the modem with the screw holes and press the modem into the connector on the system 
board.
cReplace the screw that secures the modem to the system board.
5Replace the modem/Mini-Card/wireless cover.
1screw2modem cable3modem
4pull-tab5system board connector
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5
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2
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							Adding and Replacing Parts123
Mini-Card 
If you ordered a Mini-Card with your computer, the card is already installed.
 CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product 
Information Guide.
1Follow the procedures in Before You Begin on page 109. 
2If a Mini-Card is not already installed, go to step . If you are replacing a Mini-Card, remove the existing 
card:
aDisconnect both antenna cables from the Mini-Card.
bRelease the Mini-Card by pushing the metal securing clips toward the back of the computer until 
the card pops up slightly.
cLift the Mini-Card out of its connector.
1antenna cables (2)
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							124Adding and Replacing Parts
 NOTICE: The connectors are color-keyed to ensure correct insertion. If you feel resistance, check the connectors 
and realign the card.
3Install the replacement Mini-Card:
 NOTICE: To avoid damaging the Mini-Card, make sure the antenna cables are not under the card when you click 
the card into place.
a
Align the Mini-Card with the connector at a 45-degree angle, and press the Mini-Card into the 
connector until it clicks.
 NOTICE: To avoid damaging the Mini-Card, never place cables under the card.
b
Connect the antenna cables to the antenna connectors on the Mini-Card by matching the color of 
the cable to the color of the triangle above the connector. Connect the main antenna cable (white) 
to the antenna connector with the white triangle. Connect the auxiliary antenna cable (black) to 
the antenna connector with the black triangle. 
 NOTE: If your computer has a gray cable, connect it to the connector with the gray triangle, if one is available on 
your card. 1metal securing tabs (2)2Mini-Card
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							Adding and Replacing Parts125
Hinge Cover
Removing the Hinge Cover
 CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product 
Information Guide.
 
NOTICE: To avoid electrostatic discharge, ground yourself by using a wrist grounding strap or by periodically 
touching an unpainted metal surface (such as a connector on the back of the computer).
 
NOTICE: To avoid damaging the system board, you must remove the main battery before you begin working inside 
the computer.
 
NOTICE: The hinge cover is fragile and can be damaged if extreme force is used. Be careful when removing the 
hinge cover. 
1Follow the procedures in Before You Begin on page 109.
2Remove the battery (see Replacing the Battery on page 41). 
3Remove the two screws inside the battery bay.
1antenna cables (2)
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							126Adding and Replacing Parts
4Turn the computer right-side up, and then open the display all the way (180 degrees) so that it rests on 
your work surface.
 NOTICE: To avoid damaging the hinge cover, do not lift the cover on both sides simultaneously.
5Insert a scribe into the indent to lift the hinge cover on the right side.
6Ease the hinge cover up, moving from right to left, and remove it. 
1screws (2)
1hinge cover2indent
1
1
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							Adding and Replacing Parts127
Replacing the Hinge Cover 
1Insert the left edge of the cover into place. 
2Press from left to right until the cover snaps into place. 
3Close the display and turn the computer upside down. 
4Replace the two screws in the battery bay. 
5Replace the battery (see Replacing the Battery on page 41). 
Keyboard
 CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product 
Information Guide.
 
NOTICE: To avoid electrostatic discharge, ground yourself by using a wrist grounding strap or by periodically 
touching an unpainted metal surface (such as a connector on the back of the computer).
 
NOTICE: To avoid damaging the system board, you must remove the main battery before you begin working inside 
the computer. 
Removing the Keyboard
1Follow the procedures in Before You Begin on page 109.
2Remove the hinge cover. See Hinge Cover on page 125.
 NOTICE: The keycaps on the keyboard are fragile, easily dislodged, and time-consuming to replace. Be careful 
when removing and handling the keyboard.
3Lift the keyboard and hold it up and slightly forward to allow access to the keyboard connector. 
4Release the lever on the system board connector to disconnect the keyboard cable from the system 
board. 
						

							128Adding and Replacing Parts
Replacing the Keyboard
 NOTICE: To avoid scratching the palm rest when replacing the keyboard, hook the six tabs along the front edge of 
the keyboard into the palm rest, and then secure the keyboard in place.
1Connect the keyboard cable to the system board.
2Fasten the keyboard cable with the lever on the system board connector.
3Place the six tabs along the front edge of the keyboard into the palm rest.
Internal Card With Bluetooth® Wireless Technology
 CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product 
Information Guide.
 
NOTICE: To avoid electrostatic discharge, ground yourself by using a wrist grounding strap or by periodically 
touching an unpainted metal surface (such as a connector on the back of the computer). 1keyboard2keyboard cable3lever on system 
board connector
4tabs (6)
41
3
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							Adding and Replacing Parts129
 NOTICE: To avoid damaging the system board, you must remove the main battery before you begin working inside 
the computer. 
If you ordered a card with Bluetooth wireless technology with your computer, the card is already installed.
1
Follow the procedures in Before You Begin on page 109.
2Loosen the captive screws in the modem/Mini-Card/wireless cover, and then remove the cover. 
3Remove the screw securing the card carrier. 
4Pull the carrier out of the compartment so that you can disconnect the card from its cable and remove 
the card from the computer.
5To replace the card, connect the card to the cable.
6Then carefully insert the card into the carrier and insert the carrier into the compartment. 
7Replace the screw securing the card carrier into place. 
1screw2card carrier3card
4card connector
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							130Adding and Replacing Parts
Coin-Cell Battery 
Removing the Coin-Cell Battery
 CAUTION: Before you perform the following procedures, see the safety instructions in the Product Information 
Guide.
 
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: To avoid damaging the system board, you must remove the main battery before you begin working inside 
the computer. 
1Follow the procedures in Before You Begin on page 109.
2Remove the hinge cover (see page 125).
3Remove the keyboard (see page 127).
4Use a plastic scribe to lift the battery upward to remove it from the system board. 
Replacing the Coin-Cell Battery
When you replace the battery, insert it into the circular socket with the positive side up, and gently push 
it into place.
1coin-cell battery
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