dell latitude c840 User Manual

Microprocessor Module: Dell Latitude C840 Service Manual
Back to Contents Page 
Microprocessor 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. 
 
Removing the Microprocessor Module 
1.  Follow the instructions in Preparing to Work Inside the Computer. 
2.  Remove...

Microprocessor Module: Dell Latitude C840 Service Manual
NOTICE: To ensure maximum cooling for the microprocessor, do not touch the 
heat transfer areas on the microprocessor thermal-cooling assembly. The \
oils in 
your skin reduce the heat transfer capability of the thermal pads. 
4.  Remove the 
microprocessor thermal-cooling assembly. 
NOTICE: When removing the microprocessor module, pull the module straight 
up. Do not bend the pins. 
5.  Remove the microprocessor module. 
NOTICE: To avoid damage to...

Microprocessor Module: Dell Latitude C840 Service Manual
 
1 cam screw
2 perpendicular 
screwdriver
3 processor die (do not 
touch)
b.  Use the microprocessor extraction tool to remove the microprocessor module. 
Replacing the Microprocessor Module 
NOTICE: If you received a flash BIOS update floppy disk or CD with the 
replacement microprocessor, you must update the BIOS after replacing the\
 
microprocessor module. 
NOTICE: Proper seating of the microprocessor module does not require force. 
NOTICE: A...

Microprocessor Module: Dell Latitude C840 Service Manual
1.  Align the pin-1 triangle on the microprocessor with the pin-1 triangle i\
n the socket, insert the microprocessor into the socket, and move the micropro\
cessor 
around slightly until you feel it settle into the socket. 
When the microprocessor module is correctly seated, all four corners are\
 aligned 
to the same height. If one or more corners of the module are higher than\
 the 
others, the module is not seated correctly.
NOTICE: Hold the...

Microprocessor Module: Dell Latitude C840 Service Manual
 
4.  Close the microprocessor retaining clip. 
5.  To latch the clip, insert a flat-blade scribe into the latch mechanism a\
nd pivot  the top of the scribe away from the clip. 
Back to Contents Page
 
 
 
file:///F|/Service%20Manuals/Dell/Latitude/c840/cpu.htm (5 of 5) [2/28\
/2004 8:03:42 AM] 

Video Graphics Board: Dell Latitude C840 Service Manual
Back to Contents Page 
Video Graphics 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 M2.5 x 8-mm screws (3)
Removing the Video Graphics Board 
1.  Follow the instructions in Preparing to Work Inside the...

Video Graphics Board: Dell Latitude C840 Service Manual
3.  Remove the hinge cover. 
NOTICE: The video graphics board may have a metallic or cardboard-like EMI 
shield attached to the top. If present, the EMI shield is removed with t\
he board. 
Do not reuse the EMI shield on the replacement video board. Newer versio\
ns of 
the board may not require the shield; if a shield is required, it is alr\
eady 
attached to the replacement board. 
4.  Detach the 
display flex cable from the graphics card. 
5....

Palm Rest: Dell Latitude C840 Service Manual
Back to Contents Page 
Palm Rest 
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 pull loop
file:///F|/Service%20Manuals/Dell/Latitude/c840/palmrest.htm (1 of 4) \
[2/28/2004 8:03:43 AM] 

Palm Rest: Dell Latitude C840 Service Manual
NOTICE: The reserve battery provides power to the computers time RTC and 
NVRAM when the computer is turned off. Removing the palm rest disconnect\
s 
the reserve battery and causes the computer to lose the date and time 
information as well as all user-specified parameters in NVRAM. If possib\
le, copy 
the information before you disconnect the reserve battery. 
Removing the Palm Rest 
1.  Follow the instructions in Preparing to Work Inside the Computer. 
2....

Palm Rest: Dell Latitude C840 Service Manual
 
1 M2.5 x 20-mm screws 
(9)
8.  Turn the computer over. 
9.  Use the pull loop to disconnect the palm-rest flex cable from the touch-\
pad  connector on the system board. 
10.  On the left and right sides of the palm rest, use a flat-blade scribe be\
tween the  palm rest and the bottom case of the computer to separate the snaps that\
 
secure the palm rest to the bottom case. 
11.  Lift out the palm rest....