dell latitude c540 User Manual

Hybrid Cooling Fan: Dell Latitude C540/C640 Service Manual
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Hybrid Cooling Fan 
Dell™ Latitude™ C540/C640 Service Manual
Removing the Hybrid Cooling Fan 
NOTICE: Disconnect the computer and any attached devices from electrical 
outlets, and remove any installed batteries. 
NOTICE: To avoid ESD, ground yourself by using a wrist grounding strap or by 
touching an unpainted metal surface on the computer. 
NOTICE: Read Preparing to Work Inside the Computer before performing the...

Hybrid Cooling Fan: Dell Latitude C540/C640 Service Manual
 
1 system-board interface 
connector 5
M2 x 3-mm screw 
(1)
2 fan power cable 6M2.5 x 5-mm screws 
(2)
3 spring fingers 7hybrid cooling fan
4 keyboard screw hole   
7.  Disconnect the fan power cable from the system-board interface connector\
 and  remove the hybrid cooling fan. 
NOTE: The fan power cable is long, and can be pulled out from under the EMI 
shield to provide access to the connector. 
NOTICE: Do not block the keyboard screw hole...

Hybrid Cooling Fan: Dell Latitude C540/C640 Service Manual
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Reserve Battery: Dell Latitude C540/C640 Service Manual
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Reserve Battery 
Dell™ Latitude™ C540/C640 Service Manual
Removing the Reserve Battery 
NOTICE: The reserve battery provides power to the computers RTC and 
NVRAM when the computer is turned off. Removing the battery causes the 
computer to lose the date and time information as well as all user-speci\
fied 
parameters in the BIOS. If possible, copy the information before you rem\
ove 
the reserve battery. 
NOTICE: Disconnect...

Reserve Battery: Dell Latitude C540/C640 Service Manual
 
1 reserve battery
2 reserve battery tray
3 reserve battery cable
4 reserve battery 
connector on system 
board
5 speaker cables
6 opening for reserve 
battery cable
Replacing the Reserve Battery 
1.  Connect the reserve battery cable to the reserve battery connector on th\
e 
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Reserve Battery: Dell Latitude C540/C640 Service Manual
system board and then route the battery cable through the opening in the\
 EMI 
shield to the battery tray. 
2.  Remove the backing from the adhesive on the bottom of the reserve batter\
y,  and press the battery into place in the battery tray. 
3.  Update the BIOS using a flash BIOS update floppy disk or CD. For instruc\
tions  on how to flash the BIOS, see 
Flashing the BIOS. 
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Flashing the BIOS: Dell Latitude C540/C640 Service Manual
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Flashing the BIOS 
Dell™ Latitude™ C540/C640 Service Manual
To update the basic input/output system (BIOS):1.  Ensure that the AC adapter is plugged in and that the main battery is in\
stalled  properly. 
2.  Turn on the computer and press 
 to enter the system setup program. 
3.  Reset the boot sequence to boot first from the floppy drive or the CD dr\
ive  (depending on whether your flash BIOS update is supplied on floppy...

Speaker Assemblies: Dell Latitude C540/C640 Service Manual
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Speaker Assemblies 
Dell™ Latitude™ C540/C640 Service Manual
Removing the Speaker Assemblies 
NOTICE: Disconnect the computer and any attached devices from electrical 
outlets, and remove any installed batteries. 
NOTICE: To avoid ESD, ground yourself by using a wrist grounding strap or by 
touching an unpainted metal surface on the computer. 
NOTICE: Read Preparing to Work Inside the Computer before performing the...

Speaker Assemblies: Dell Latitude C540/C640 Service Manual
 
1 right speaker
2 palm-rest screw posts 
(2)
3 bottom case holders (2)
4 left speaker
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Speaker Assemblies: Dell Latitude C540/C640 Service Manual
 
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