Dell Latitude C840 Support Question
Dell Latitude C840 Support Question
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Question posted by suspend on October 10th, 2011
How Do You Get The Infrared Light To Work On The Dell C840?
how do you get the infrared light to work on the dell C840?
Current Answers
Answer #1: Posted by kcmjr on October 10th, 2011 12:19 PM
kcmjr
Member since:
May 5th, 2011 Points: 4,254,255
Member since:
May 5th, 2011 Points: 4,254,255
The infrared port is a communications port same as a serial port or parallel port. You need an appropriate device to link it to such as a printer or another laptop.
A quote from the user guide: "The infrared sensor lets you transfer files from your computer to another infrared-compatible device without using cable connections. When you receive your computer, the infrared sensor is disabled. You can use the system setup program to enable the infrared sensor. For information on transferring data, see Windows Help, the Windows Help and Support Center, or the documentation that came with your infrared-compatible device."
Documentation is available here: https://support.dell.com/support/edocs/systems/latc840/en/index.htm
Licenses & Certifications: Microsoft, Cisco, VMware, Novell, FCC RF & Amateur Radio licensed.
Related Dell Latitude C840 Manual Pages
System Information Guide - Page 19
1 display latch
8 touch pad
2 display
9 battery bay
3 device status lights 10 module bay
4 air vent
11 track stick/touch pad buttons
5 keyboard status lights 12 Dell™ AccessDirect™ button
6 keyboard
13 power button
7 track stick
14 microphone
Left Side View
1
23
4 56
System Infor mation Guide 17
Service Manual - Page 1
Dell Latitude C840 Service Manual
Dell™ Latitude™ C840 Service Manual
Before You Begin Preparing to Work Inside the Computer Recommended Tools Computer Orientation Screw Identification
System Components Hard Drive and Fixed ... LED Board Fan RJ-11/RJ-45 Module Pin Assignments for I/O Connectors
file:///F|/Service%20Manuals/Dell/Latitude/c840/index.htm (1 of 2) [2/28/2004 8:03:26 AM]
Service Manual - Page 2
.... Ensure that the computer is flat and clean to servicing that the computer is not covered by Dell is undocked. 5. Turn off the computer, ensure that the work in your computer.
file:///F|/Service%20Manuals/Dell/Latitude/c840/begin working inside the computer.
1. Damage due to prevent scratching the computer cover.
2. Ensure that is not authorized by...
Service Manual - Page 3
... any installed batteries before you work, periodically touch an unpainted
metal surface on a flat work surface. 10.
To dissipate static electricity while you service the computer.
11. Recommended Tools
The procedures in the module bay. 12. Disconnect all other external cables from the computer. 8. Before You Begin: Dell Latitude C840 Service Manual
6. Handle components and...
Service Manual - Page 11
Follow the instructions in "Preparing to Work Inside the Computer." 2. Replacing the Hard Drive
1. Pull the hard drive out. Push the hard drive into the drive bay until the drive door is flush with the computer case. file:///F|/Service%20Manuals/Dell/Latitude/c840/hdd.htm (2 of computer 2 M3 x 5-mm screw 3 hard drive door
Removing the...
Service Manual - Page 13
... captive screw from interfering with the pull
tab) and pull out the pull tab. 4. Turn the computer over (to Work Inside the Computer." 2. Use the pull tab to Contents Page
file:///F|/Service%20Manuals/Dell/Latitude/c840/hdd.htm (4 of the computer. 3. Back to remove the fixed optical drive. Loosen the captive screw on the...
Service Manual - Page 15
Follow the instructions in "Preparing to Work Inside the Computer." 2. Disengage the metal tabs at the opposite end of 9) [2/28/2004 8:03:38 AM]
file:///F|/Service%20Manuals/Dell/Latitude/c840/upgrades.htm (2 of the cover. Remove the M2.5 x 20-mm screw from the memory module/modem cover. 3. System Upgrades: Dell Latitude C840 Service Manual
1 M2.5 x 20-mm screw 1.
Service Manual - Page 17
... attached devices from electrical outlets and remove any installed batteries. file:///F|/Service%20Manuals/Dell/Latitude/c840/upgrades.htm (4 of 9) [2/28/2004 8:03:38 AM]
If you ...Work Inside the Computer." 2. If you do not hear a click,
remove the module and reinstall it clicks into place. Follow the instructions in the socket labeled "DIMM B."
System Upgrades: Dell Latitude C840...
Service Manual - Page 20
... pops
up slightly. 4.
Follow the instructions in "Preparing to Work Inside the Computer." 2. Remove the M2.5 x 20-mm screw and then remove the Mini PCI card cover. 3. System Upgrades: Dell Latitude C840 Service Manual
1 M2.5 x 20-mm screw
Removing the Mini PCI Card
1. file:///F|/Service%20Manuals/Dell/Latitude/c840/upgrades.htm (7 of 9) [2/28/2004 8:03:38 AM...
Service Manual - Page 24
... 5) [2/28/2004 8:03:39 AM] Turn the computer over and remove the four M2.5 x 20-mm screws (three
labeled "circle K" and one labeled "circle K/M"). 3. Keyboard: Dell Latitude C840 Service Manual
1 M2.5 x 20-mm screws (4)
Removing the Keyboard
1.
NOTICE: Be careful when handling the keyboard. The keycaps are fragile, easily dislodged, and time-consuming...
Service Manual - Page 30
... until the hinge cover pops off the hinge cover. Open the computer and use the scribe to Work Inside the Computer." 2. Open the display and lift off .
4. key and the
Display Assembly
file:///F|/Service%20Manuals/Dell/Latitude/c840/display.htm (3 of the computer.
3. Use a nonmarring plastic scribe to loosen the hinge cover at the...
Service Manual - Page 39
... Assembly
1. Pry open the clip by pivoting the top of the screwdriver toward the right side of the computer.
1 microprocessor thermalcooling assembly
file:///F|/Service%20Manuals/Dell/Latitude/c840/thermal.htm (2 of
the microprocessor retaining clip. Insert a non-marring plastic scribe into the latch mechanism at the left side of 3) [2/28/2004 8:03:41...
Service Manual - Page 41
... Manual
NOTICE: Disconnect the computer and attached devices from electrical outlets and remove any installed batteries.
Removing the Microprocessor Module
1. Microprocessor Module: Dell Latitude C840 Service Manual
Back to Work Inside the Computer." 2. Remove the keyboard. 3. Remove the hinge cover. NOTICE: To avoid ESD, ground yourself by using a wrist grounding strap or by periodically...
Service Manual - Page 46
....htm (1 of 2) [2/28/2004 8:03:42 AM] Remove the keyboard. Video Graphics Board: Dell Latitude C840 Service Manual
Back to Work Inside the Computer." 2. 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 ...
Service Manual - Page 49
...7. Remove the display assembly.
Remove the keyboard. 4. Remove the hard drive and the fixed optical drive. 3. Palm Rest: Dell Latitude C840 Service Manual
NOTICE: The reserve battery provides power to the computer. If possible, copy the information before you must first remove ...information as well as all user-specified parameters in "Preparing to Work Inside the Computer." 2.
Service Manual - Page 53
.... 3.
Remove the display assembly. 5. Remove the hinge cover. 4. file:///F|/Service%20Manuals/Dell/Latitude/c840/resbatt.htm (2 of the palm rest, disconnect the palm-rest flex cable from the
...remove the reserve battery. Removing the battery causes the computer to Work Inside the Computer." 2. Reserve Battery: Dell Latitude C840 Service Manual
NOTICE: The reserve battery provides power to the ...
Service Manual - Page 56
...
Remove the hard drive and the fixed optical drive. 3. file:///F|/Service%20Manuals/Dell/Latitude/c840/sysboard.htm (2 of the computer. The replacement kit for the system board ... transferring the service tag sequence to Work Inside the Computer." 2. Remove (if migrating) or disconnect the modem daughter card. 6. System Board: Dell Latitude C840 Service Manual
2 system board 3 network...
Service Manual - Page 57
...
a. Do not pull on the cover lightly to secure it, and pry upward to release the cover.
1 network cable cover b. file:///F|/Service%20Manuals/Dell/Latitude/c840/sysboard.htm (3 of the upper connector ... pry up the outer corner of 5) [2/28/2004 8:03:45 AM] System Board: Dell Latitude C840 Service Manual
12. First remove the network cable cover: Insert a narrow plastic scribe or small...
Service Manual - Page 58
...plastic near the back left corner of 5) [2/28/2004 8:03:45 AM] System Board
file:///F|/Service%20Manuals/Dell/Latitude/c840/sysboard.htm (4 of the bottom case (see the small arrow at the far left in the following figure...the center of upper connector
2 network cable 14. System Board: Dell Latitude C840 Service Manual
1 outer corner of the LED board. 16. Lift the front of the system board and...
User Guide - Page 2
... View Left Side View Right Side View Back View Bottom View
Front View
1 display latch
8 touch pad
2 display
9 battery bay
3 device status lights 10 module bay
4 air vent
11 touch pad/track stick buttons
5 keyboard status lights 12 Dell™ AccessDirect™ button
6 keyboard
13 power button
7 track stick
14 microphone
Display Latch -
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