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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 Optical Drive Hard Drive ... Reserve Battery System Board Battery and Module Bay Latches Battery Charger Board 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]
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 Optical Drive Hard Drive ... Reserve Battery System Board Battery and Module Bay Latches Battery Charger Board 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]
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...-management mode. 4. Ensure that is not authorized by your warrantly. Disconnect the computer from the electrical outlet. Before You Begin: Dell Latitude C840 Service Manual Back to Contents Page Before You Begin Dell™ Latitude™ C840 Service Manual Preparing to Work Inside the Computer Recommended Tools Computer Orientation Screw Identification Preparing to Work Inside the Computer CAUTION: Only a certified...
...-management mode. 4. Ensure that is not authorized by your warrantly. Disconnect the computer from the electrical outlet. Before You Begin: Dell Latitude C840 Service Manual Back to Contents Page Before You Begin Dell™ Latitude™ C840 Service Manual Preparing to Work Inside the Computer Recommended Tools Computer Orientation Screw Identification Preparing to Work Inside the Computer CAUTION: Only a certified...
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... edges, and avoid touching pins and contacts. To dissipate static electricity while you service the computer. 11. To avoid possible damage to the system board, wait 10 to upgrade the BIOS) file:///F|/Service%20Manuals/Dell/Latitude/c840/begin.htm (2 of 6) [2/28/2004 8:03:35 AM] Remove any installed... all other external cables from the PC Card slot. 9. Remove the battery from the battery bay. Before You Begin: Dell Latitude C840 Service Manual 6. NOTICE: To avoid component damage, always remove any attached devices. 7. Recommended Tools The procedures in the module bay. 12.
... edges, and avoid touching pins and contacts. To dissipate static electricity while you service the computer. 11. To avoid possible damage to the system board, wait 10 to upgrade the BIOS) file:///F|/Service%20Manuals/Dell/Latitude/c840/begin.htm (2 of 6) [2/28/2004 8:03:35 AM] Remove any installed... all other external cables from the PC Card slot. 9. Remove the battery from the battery bay. Before You Begin: Dell Latitude C840 Service Manual 6. NOTICE: To avoid component damage, always remove any attached devices. 7. Recommended Tools The procedures in the module bay. 12.
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Screw Identification file:///F|/Service%20Manuals/Dell/Latitude/c840/begin.htm (3 of the component screws. Before You Begin: Dell Latitude C840 Service Manual Computer Orientation Screw Identification When you are removing and replacing components, photocopy the placemat as a tool to lay out and keep track of 6) [2/28/2004 8:03:35 AM] The placemat provides the number of screws and the sizes.
Screw Identification file:///F|/Service%20Manuals/Dell/Latitude/c840/begin.htm (3 of the component screws. Before You Begin: Dell Latitude C840 Service Manual Computer Orientation Screw Identification When you are removing and replacing components, photocopy the placemat as a tool to lay out and keep track of 6) [2/28/2004 8:03:35 AM] The placemat provides the number of screws and the sizes.
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Ensure that the screw is properly aligned with its corresponding hole, and avoid overtightening. Hard-Drive Door Security: M3 x 5 mm (1 each ; Before You Begin: Dell Latitude C840 Service Manual NOTICE: When reinstalling a screw, you must use a screw of 6) [2/28/2004 8:03:35 AM] one in memory door and one in Mini PCI door) ... each) Video Graphics Board: M2.5 x 8 (3 each) M2.5 x 4 mm (6 each) Flex-Cable Mounting Bracket to Bottom Case: M2.5 x 20 mm (4 each ) Keyboard to Top Cover: file:///F|/Service%20Manuals/Dell/Latitude/c840/begin.htm (4 of the correct diameter and length.
Ensure that the screw is properly aligned with its corresponding hole, and avoid overtightening. Hard-Drive Door Security: M3 x 5 mm (1 each ; Before You Begin: Dell Latitude C840 Service Manual NOTICE: When reinstalling a screw, you must use a screw of 6) [2/28/2004 8:03:35 AM] one in memory door and one in Mini PCI door) ... each) Video Graphics Board: M2.5 x 8 (3 each) M2.5 x 4 mm (6 each) Flex-Cable Mounting Bracket to Bottom Case: M2.5 x 20 mm (4 each ) Keyboard to Top Cover: file:///F|/Service%20Manuals/Dell/Latitude/c840/begin.htm (4 of the correct diameter and length.
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Before You Begin: Dell Latitude C840 Service Manual M2.5 x 4 mm (1 each) Palm Rest to Bottom Case: M2.5 x 20 mm (9 each) System Board: M2.5 x 4 mm captive washer (3 each) LED Board: M2 x 4 mm (2 each) Palm Rest Bracket: M2.5 x 4 mm (4 each) M2.5 x 20 mm (1 each) Fan: M2 x 4 mm (3 each) Memory Module/Modem Cover: M2.5 x 20 mm (1 each) Modem Daughter Card: M2 x 3 mm (1 each) Mini PCI Card: M2.5 x 20 mm (1 each) Back to Contents Page file:///F|/Service%20Manuals/Dell/Latitude/c840/begin.htm (5 of 6) [2/28/2004 8:03:35 AM]
Before You Begin: Dell Latitude C840 Service Manual M2.5 x 4 mm (1 each) Palm Rest to Bottom Case: M2.5 x 20 mm (9 each) System Board: M2.5 x 4 mm captive washer (3 each) LED Board: M2 x 4 mm (2 each) Palm Rest Bracket: M2.5 x 4 mm (4 each) M2.5 x 20 mm (1 each) Fan: M2 x 4 mm (3 each) Memory Module/Modem Cover: M2.5 x 20 mm (1 each) Modem Daughter Card: M2 x 3 mm (1 each) Mini PCI Card: M2.5 x 20 mm (1 each) Back to Contents Page file:///F|/Service%20Manuals/Dell/Latitude/c840/begin.htm (5 of 6) [2/28/2004 8:03:35 AM]
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System Components: Dell Latitude C840 Service Manual Back to Contents Page System Components Dell™ Latitude™ C840 Service Manual NOTICE: Unless otherwise noted, each procedure in this document assumes that a part can be replaced by performing the removal procedure in reverse order. file:///F|/Service%20Manuals/Dell/Latitude/c840/system.htm (1 of 2) [2/28/2004 8:03:36 AM]
System Components: Dell Latitude C840 Service Manual Back to Contents Page System Components Dell™ Latitude™ C840 Service Manual NOTICE: Unless otherwise noted, each procedure in this document assumes that a part can be replaced by performing the removal procedure in reverse order. file:///F|/Service%20Manuals/Dell/Latitude/c840/system.htm (1 of 2) [2/28/2004 8:03:36 AM]
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System Components: Dell Latitude C840 Service Manual 1 display assembly 2 hinge cover 3 microprocessor thermalcooling assembly 4 system board 5 hard drive 6 bottom case 7 main battery 8 device in module bay 9 fixed optical drive 10 palm rest 11 keyboard Back to Contents Page file:///F|/Service%20Manuals/Dell/Latitude/c840/system.htm (2 of 2) [2/28/2004 8:03:36 AM]
System Components: Dell Latitude C840 Service Manual 1 display assembly 2 hinge cover 3 microprocessor thermalcooling assembly 4 system board 5 hard drive 6 bottom case 7 main battery 8 device in module bay 9 fixed optical drive 10 palm rest 11 keyboard Back to Contents Page file:///F|/Service%20Manuals/Dell/Latitude/c840/system.htm (2 of 2) [2/28/2004 8:03:36 AM]
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... not covered by your computer. Hard Drive and Fixed Optical Drive: Dell Latitude C840 Service Manual Back to Contents Page Hard Drive and Fixed Optical Drive Dell™ Latitude™ C840 Service Manual Hard Drive Fixed Optical Drive NOTICE: Only a certified service technician should perform repairs on the computer. NOTICE: To avoid ESD, ground yourself by using a wrist grounding strap or...
... not covered by your computer. Hard Drive and Fixed Optical Drive: Dell Latitude C840 Service Manual Back to Contents Page Hard Drive and Fixed Optical Drive Dell™ Latitude™ C840 Service Manual Hard Drive Fixed Optical Drive NOTICE: Only a certified service technician should perform repairs on the computer. NOTICE: To avoid ESD, ground yourself by using a wrist grounding strap or...
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file:///F|/Service%20Manuals/Dell/Latitude/c840/hdd.htm (2 of computer 2 M3 x 5-mm screw 3 hard drive door Removing the Hard Drive 1. Replacing the Hard Drive 1. Push the hard drive into the drive bay until the drive door is flush with the computer case. Pull the hard drive out. Follow the instructions in "Preparing to Work Inside the Computer." 2. Remove the M3 x 5-mm screw. 3. Hard Drive and Fixed Optical Drive: Dell Latitude C840 Service Manual 1 bottom of 4) [2/28/2004 8:03:36 AM]
file:///F|/Service%20Manuals/Dell/Latitude/c840/hdd.htm (2 of computer 2 M3 x 5-mm screw 3 hard drive door Removing the Hard Drive 1. Replacing the Hard Drive 1. Push the hard drive into the drive bay until the drive door is flush with the computer case. Pull the hard drive out. Follow the instructions in "Preparing to Work Inside the Computer." 2. Remove the M3 x 5-mm screw. 3. Hard Drive and Fixed Optical Drive: Dell Latitude C840 Service Manual 1 bottom of 4) [2/28/2004 8:03:36 AM]
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Replace the M3 x 5-mm screw in the hard drive door. Fixed Optical Drive NOTICE: Disconnect the computer and attached devices from the electrical outlet and remove any installed batteries. Push down on the computer. 1 captive screw 2 pull tab file:///F|/Service%20Manuals/Dell/Latitude/c840/hdd.htm (3 of 4) [2/28/2004 8:03:36 AM] Hard Drive and Fixed Optical Drive: Dell Latitude C840 Service Manual 2. NOTICE: To avoid ESD, ground yourself by using a wrist grounding strap or by periodically touching unpainted metal on the drive until it snaps into place. 3.
Replace the M3 x 5-mm screw in the hard drive door. Fixed Optical Drive NOTICE: Disconnect the computer and attached devices from the electrical outlet and remove any installed batteries. Push down on the computer. 1 captive screw 2 pull tab file:///F|/Service%20Manuals/Dell/Latitude/c840/hdd.htm (3 of 4) [2/28/2004 8:03:36 AM] Hard Drive and Fixed Optical Drive: Dell Latitude C840 Service Manual 2. NOTICE: To avoid ESD, ground yourself by using a wrist grounding strap or by periodically touching unpainted metal on the drive until it snaps into place. 3.
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Loosen the captive screw on the bottom of 4) [2/28/2004 8:03:36 AM] Follow the instructions in "Preparing to remove the fixed optical drive. Use the pull tab to Work Inside the Computer." 2. Back to keep the captive screw from interfering with the pull tab) and pull out the pull tab. 4. Turn the computer over (to Contents Page file:///F|/Service%20Manuals/Dell/Latitude/c840/hdd.htm (4 of the computer. 3. Hard Drive and Fixed Optical Drive: Dell Latitude C840 Service Manual Removing the Fixed Optical Drive 1.
Loosen the captive screw on the bottom of 4) [2/28/2004 8:03:36 AM] Follow the instructions in "Preparing to remove the fixed optical drive. Use the pull tab to Work Inside the Computer." 2. Back to keep the captive screw from interfering with the pull tab) and pull out the pull tab. 4. Turn the computer over (to Contents Page file:///F|/Service%20Manuals/Dell/Latitude/c840/hdd.htm (4 of the computer. 3. Hard Drive and Fixed Optical Drive: Dell Latitude C840 Service Manual Removing the Fixed Optical Drive 1.
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NOTICE: To avoid ESD, ground yourself by using a wrist grounding strap or by periodically touching unpainted metal on the computer. Removing the Memory Module/Modem Cover file:///F|/Service%20Manuals/Dell/Latitude/c840/upgrades.htm (1 of 9) [2/28/2004 8:03:38 AM] System Upgrades: Dell Latitude C840 Service Manual Back to Contents Page System Upgrades Dell™ Latitude™ C840 Service Manual Memory Modules Modem Daughter Card Mini PCI Card Memory Modules 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 periodically touching unpainted metal on the computer. Removing the Memory Module/Modem Cover file:///F|/Service%20Manuals/Dell/Latitude/c840/upgrades.htm (1 of 9) [2/28/2004 8:03:38 AM] System Upgrades: Dell Latitude C840 Service Manual Back to Contents Page System Upgrades Dell™ Latitude™ C840 Service Manual Memory Modules Modem Daughter Card Mini PCI Card Memory Modules NOTICE: Disconnect the computer and any attached devices from electrical outlets and remove any installed batteries.
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Remove the M2.5 x 20-mm screw from the memory module/modem cover. 3. 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. Follow the instructions in "Preparing to Work Inside the Computer." 2. System Upgrades: Dell Latitude C840 Service Manual 1 M2.5 x 20-mm screw 1.
Remove the M2.5 x 20-mm screw from the memory module/modem cover. 3. 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. Follow the instructions in "Preparing to Work Inside the Computer." 2. System Upgrades: Dell Latitude C840 Service Manual 1 M2.5 x 20-mm screw 1.
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Remove the memory module/modem cover. 2. Lift the memory module out of its socket, spread apart the tabs at each side of 9) [2/28/2004 8:03:38 AM] System Upgrades: Dell Latitude C840 Service Manual 1 DIMM B 2 memory module sockets (2) 3 DIMM A socket 4 modem daughter card 5 metal tabs (2 per socket) Removing the Memory Modules 1. file:///F|/Service%20Manuals/Dell/Latitude/c840/upgrades.htm (3 of the module until the module pops up slightly. 3. To release a memory module from its socket.
Remove the memory module/modem cover. 2. Lift the memory module out of its socket, spread apart the tabs at each side of 9) [2/28/2004 8:03:38 AM] System Upgrades: Dell Latitude C840 Service Manual 1 DIMM B 2 memory module sockets (2) 3 DIMM A socket 4 modem daughter card 5 metal tabs (2 per socket) Removing the Memory Modules 1. file:///F|/Service%20Manuals/Dell/Latitude/c840/upgrades.htm (3 of the module until the module pops up slightly. 3. To release a memory module from its socket.
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... at a 45-degree angle and press the module firmly into their sockets in only one memory module, install it in the socket labeled "DIMM B." file:///F|/Service%20Manuals/Dell/Latitude/c840/upgrades.htm (4 of 9) [2/28/2004 8:03:38 AM] Modem Daughter Card Removing the Modem Daughter Card NOTICE: Disconnect the computer and any attached devices... and remove the memory module/modem cover. If you only have one direction. 2. Follow the instructions in "Preparing to fit into the slot. 3. System Upgrades: Dell Latitude C840 Service Manual Replacing the Memory Modules 1.
... at a 45-degree angle and press the module firmly into their sockets in only one memory module, install it in the socket labeled "DIMM B." file:///F|/Service%20Manuals/Dell/Latitude/c840/upgrades.htm (4 of 9) [2/28/2004 8:03:38 AM] Modem Daughter Card Removing the Modem Daughter Card NOTICE: Disconnect the computer and any attached devices... and remove the memory module/modem cover. If you only have one direction. 2. Follow the instructions in "Preparing to fit into the slot. 3. System Upgrades: Dell Latitude C840 Service Manual Replacing the Memory Modules 1.
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System Upgrades: Dell Latitude C840 Service Manual 1 modem daughter card 2 M2 x 3-mm screw 3. NOTICE: Do not pull on the end of its connector. Replacing the Modem Daughter Card NOTICE: The cable connectors ... on the modem cable. Use the pull tab to pull the modem daughter card straight up out of the cable to disconnect the cable. 5. file:///F|/Service%20Manuals/Dell/Latitude/c840/upgrades.htm (5 of 9) [2/28/2004 8:03:38 AM] Connect the modem cable to the system board. 4. Do not force the connections. 1. Remove the M2...
System Upgrades: Dell Latitude C840 Service Manual 1 modem daughter card 2 M2 x 3-mm screw 3. NOTICE: Do not pull on the end of its connector. Replacing the Modem Daughter Card NOTICE: The cable connectors ... on the modem cable. Use the pull tab to pull the modem daughter card straight up out of the cable to disconnect the cable. 5. file:///F|/Service%20Manuals/Dell/Latitude/c840/upgrades.htm (5 of 9) [2/28/2004 8:03:38 AM] Connect the modem cable to the system board. 4. Do not force the connections. 1. Remove the M2...
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System Upgrades: Dell Latitude C840 Service Manual 2. Mini PCI Card You must be removed. Install the M2 x 3-mm screw that secures the card to align the card, and press the card into ... modem (if installed) before the system board can be connected to the internal antenna of 9) [2/28/2004 8:03:38 AM] Mini PCI Card Cover file:///F|/Service%20Manuals/Dell/Latitude/c840/upgrades.htm (6 of the computer. NOTICE: To avoid ESD, ground yourself by using a wrist grounding strap or by periodically touching unpainted metal on the...
System Upgrades: Dell Latitude C840 Service Manual 2. Mini PCI Card You must be removed. Install the M2 x 3-mm screw that secures the card to align the card, and press the card into ... modem (if installed) before the system board can be connected to the internal antenna of 9) [2/28/2004 8:03:38 AM] Mini PCI Card Cover file:///F|/Service%20Manuals/Dell/Latitude/c840/upgrades.htm (6 of the computer. NOTICE: To avoid ESD, ground yourself by using a wrist grounding strap or by periodically touching unpainted metal on the...
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...x 20-mm screw and then remove the Mini PCI card cover. 3. Lift out the card and disconnect any attached cables. System Upgrades: Dell Latitude C840 Service Manual 1 M2.5 x 20-mm screw Removing the Mini PCI Card 1. To release the Mini PCI card, spread the metal securing tabs until ...the instructions in "Preparing to Work Inside the Computer." 2. Disconnect the card from the internal antenna. 5. Replacing the Mini PCI Card 1. file:///F|/Service%20Manuals/Dell/Latitude/c840/upgrades.htm (7 of 9) [2/28/2004 8:03:38 AM] Align the Mini PCI card with the socket at a 45-degree angle, and ...
...x 20-mm screw and then remove the Mini PCI card cover. 3. Lift out the card and disconnect any attached cables. System Upgrades: Dell Latitude C840 Service Manual 1 M2.5 x 20-mm screw Removing the Mini PCI Card 1. To release the Mini PCI card, spread the metal securing tabs until ...the instructions in "Preparing to Work Inside the Computer." 2. Disconnect the card from the internal antenna. 5. Replacing the Mini PCI Card 1. file:///F|/Service%20Manuals/Dell/Latitude/c840/upgrades.htm (7 of 9) [2/28/2004 8:03:38 AM] Align the Mini PCI card with the socket at a 45-degree angle, and ...
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Pivot the Mini PCI card down until it clicks into place. 4. NOTICE: The connectors are keyed for correct insertion; do not force the connections. 1 internal-antenna cable 2 primary-antenna connector on the card. Replace the Mini PCI card cover and the M2.5 x 20-mm screw. file:///F|/Service%20Manuals/Dell/Latitude/c840/upgrades.htm (8 of 9) [2/28/2004 8:03:38 AM] System Upgrades: Dell Latitude C840 Service Manual 2. Connect the internal-antenna cable to the primary-antenna connector on card 3.
Pivot the Mini PCI card down until it clicks into place. 4. NOTICE: The connectors are keyed for correct insertion; do not force the connections. 1 internal-antenna cable 2 primary-antenna connector on the card. Replace the Mini PCI card cover and the M2.5 x 20-mm screw. file:///F|/Service%20Manuals/Dell/Latitude/c840/upgrades.htm (8 of 9) [2/28/2004 8:03:38 AM] System Upgrades: Dell Latitude C840 Service Manual 2. Connect the internal-antenna cable to the primary-antenna connector on card 3.