dell latitude c840 User Manual

Battery and Module Bay Latches: Dell Latitude C840 Service Manual
 
1 wear ribs (2 on 
underside)
2 bumps
3 slider
4 spring
5 bottom case
6 latch housing (2)
7 latch buttons (2)
8 location of snap tabs (2)
Removing and Replacing the Battery and Module 
Bay Latches 
1.  Follow the instructions in Preparing to Work Inside the Computer. 
2.  Remove the 
keyboard. 
3.  Remove the 
hinge cover. 
4.  Remove the 
display assembly. 
5.  Remove the 
palm rest. 
6.  Remove a latch button from the bottom case by...

Battery and Module Bay Latches: Dell Latitude C840 Service Manual
b.  Ensure that the slider is inserted so that the side with the two bumps i\
s facing the back of the bottom case, and the surface with the wear ribs l\
ies 
against the upper surface of the bottom case. 
7.  Hold the upper latch assembly in place while you snap the new latch butt\
on in  from underneath the bottom case, making certain the snap tabs are fully \
engaged in the slider. 
Ensure that the newly installed latch assembly moves...

Battery Charger Board: Dell Latitude C840 Service Manual
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Battery Charger Board 
Dell™ Latitude™ C840 Service Manual
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. 
 
Removing the Battery Charger Board 
1.  Follow the instructions in Preparing to Work Inside the Computer. 
2.  Remove...

Battery Charger Board: Dell Latitude C840 Service Manual
4.  Remove the display assembly. 
5.  Remove the 
palm rest. 
6.  Remove the 
video graphics board. 
7.  Lift the battery charger board out of the system board connector. 
Replacing the Battery Charger Board 
Align the screw holes on the battery charger board with the screw holes \
on the bottom 
case, and then press the battery charger board down into its connector.
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LED Board: Dell Latitude C840 Service Manual
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LED Board 
Dell™ Latitude™ C840 Service Manual
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. 
 
1 M2 x 4-mm screws (2)
file:///F|/Service%20Manuals/Dell/Latitude/c840/led.htm (1 of 2) [2/28\
/2004 8:03:47 AM] 

LED Board: Dell Latitude C840 Service Manual
Removing the LED Board 
1.  Follow the instructions in Preparing to Work Inside the Computer. 
2.  Remove the 
hinge cover. 
3.  Remove the two M2 x 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\
, and  press the board into its connector. 
2.  Replace the two M2 x 4-mm screws. 
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Fan: Dell Latitude C840 Service Manual
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Fan 
Dell™ Latitude™ C840 Service Manual
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. 
 
1 fan cables
2 M2 x 4-mm screws (3)
Removing the Fan 
1.  Follow the instructions in Preparing to Work Inside the Computer....

Fan: Dell Latitude C840 Service Manual
2.  Remove the system board. 
3.  Remove the three M2 x 4-mm screws from the fan. 
4.  Disconnect the two fan cables from the system board. 
5.  Pull the fan away from the back-panel bracket. 
NOTICE: When reconnecting the fan cables, connect the shorter cable to the 
connector closest to the fan. Route both cables so that they will not be\
 pinched 
by the microprocessor thermal-cooling assembly. 
Back to Contents Page...

RJ-11/RJ-45 Module: Dell Latitude C840 Service Manual
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RJ-11/RJ-45 Module 
Dell™ Latitude™ C840 Service Manual
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. 
 
1 network cable
2 bottom case
3 RJ-11/RJ-45 module
4 modem cable
file:///F|/Service%20Manuals/Dell/Latitude/c840/rj11_45b.htm...

RJ-11/RJ-45 Module: Dell Latitude C840 Service Manual
Removing the RJ-11/RJ-45 Module 
1.  Follow the instructions in Preparing to Work Inside the Computer. 
2.  Remove the 
system board. 
3.  From outside the bottom case, push in and up on the RJ-11/RJ-45 module w\
hile  pulling the side of the bottom case slightly outward. When the module 
disengages, lift it out. 
Replacing the RJ-11/RJ-45 Module 
When replacing the RJ-11/RJ-45 module, hold both cables safely out of th\
e way and 
snap the housing...