Page 3 - Before You Begin; DellTM LatitudeTM C400 Service Manual; Preparing to Work Inside the Computer
Before You Begin : Dell Latitude C400 Service Manual Back to Contents Page Before You Begin Dell™ Latitude™ C400 Service Manual Preparing to Work Inside the Computer Recommended Tools Screw Identification Preparing to Work Inside the Computer NOTICE: Only a certified service technician should perfor...
Page 4 - Recommended Tools; Computer Orientation
Before You Begin : Dell Latitude C400 Service Manual 7. Disconnect all other external cables from the computer, including the IDE modular bay cable (if connected). 8. Remove any installed PC Cards or plastic blanks from the PC Card slot. 9. Close the display and turn the computer upside down on a fl...
Page 5 - Screw Identification
Before You Begin : Dell Latitude C400 Service Manual 1 back 2 right 3 front 4 left Screw Identification When you are removing and replacing components, photocopy the placemat as a tool to lay out and keep track of the screws. The placemat provides the number of screws and their sizes. Screw Identifi...
Page 9 - System Components
System Components : Dell Latitude C400 Service Manual Back to Contents Page System Components Dell™ Latitude™ C400 Service Manual NOTICE: Only a certified service technician should perform repairs on your computer. Damage due to servicing that is not authorized by Dell is not covered by your warrant...
Page 12 - Keyboard; Removing the Keyboard; Center Cover Removal
Keyboard : Dell Latitude C400 Service Manual Back to Contents Page Keyboard Dell™ Latitude™ C400 Service Manual Removing the Keyboard Replacing the Keyboard Removing the Keyboard NOTICE: Disconnect the computer and any attached devices from electrical outlets, and remove any installed batteries. NOT...
Page 14 - Keyboard Screws
Keyboard : Dell Latitude C400 Service Manual 3. Remove the four M2 x 4-mm screws that secure the back edge of the keyboard. Keyboard Screws 1 M2 x 4-mm screws (4) 2 keyboard locator tab 3 keyboard securing tabs (5) 4. Pry up the keyboard locator tab, lift the back edge of the keyboard slightly, and ...
Page 15 - Keyboard Removal; Replacing the Keyboard
Keyboard : Dell Latitude C400 Service Manual NOTICE: Do not pull on the keyboard flex cable. Keyboard Removal 1 keyboard flex cable 6. Use the pull tab to pull the keyboard flex cable up from its connector on the system board. The keyboard is now disconnected from the bottom case. Replacing the Keyb...
Page 16 - Keyboard Replacement
Keyboard : Dell Latitude C400 Service Manual pointing toward the back of the computer. NOTICE: To avoid damage to the connector pins, press the keyboard flex cable connector evenly into the interface connector on the system board, and do not reverse the keyboard connector. 3. Connect the keyboard fl...
Page 18 - Removing the Memory Module/Modem
Memory Module and Modem Daughter Card : Dell Latitude C400 Service Manual Back to Contents Page Memory Module and Modem Daughter Card Dell™ Latitude™ C400 Service Manual Removing the Memory Module/Modem Cover Removing the Memory Modules Replacing the Memory Modules Removing the Modem Daughter Card R...
Page 19 - Memory Module/Modem Cover; Removing the Memory Modules
Memory Module and Modem Daughter Card : Dell Latitude C400 Service Manual 2. Place your finger under the cover at the indentation, rotate the cover open, and remove it. Memory Module/Modem Cover Removing the Memory Modules NOTICE: Disconnect the computer and any attached devices from electrical outl...
Page 20 - Memory Module Removal
Memory Module and Modem Daughter Card : Dell Latitude C400 Service Manual NOTICE: To prevent damage to the memory module connector, do not use tools to spread the inner metal tabs that secure the memory module. 2. Use your fingertips to carefully spread apart the inner tabs on each end of the memory...
Page 22 - Modem Daughter Card Removal
Memory Module and Modem Daughter Card : Dell Latitude C400 Service Manual NOTICE: Do not pull on the modem cable. Pull from the modem connector to disconnect the cable. 3. Use the pull tab to pull the modem daughter card straight up out of its connector. 4. Disconnect the modem cable from the modem ...
Page 23 - Replacing the Modem Daughter Card
Memory Module and Modem Daughter Card : Dell Latitude C400 Service Manual Replacing the Modem Daughter Card 1. Connect the modem cable to the modem daughter card. NOTICE: The connectors are keyed for correct insertion; do not force the connections. 2. Using the screw hole and the boss at the opposit...
Page 24 - Hard Drive; Removing the Hard Drive; Hard Drive Removal
Hard Drive : Dell Latitude C400 Service Manual Back to Contents Page Hard Drive Dell™ Latitude™ C400 Service Manual Removing the Hard Drive Replacing the Hard Drive Removing the Hard Drive 1. Save and close any open files, exit any open programs, and shut down the computer. NOTICE: Disconnect the co...
Page 25 - Replacing the Hard Drive
Hard Drive : Dell Latitude C400 Service Manual 1 bottom of computer 2 M2.5 x 12-mm screw (1) 3 hard drive door 4. Slide the hard drive straight out of the computer. Replacing the Hard Drive NOTICE: Use firm and even pressure to slide the hard drive into place. If you force the hard drive into place ...
Page 27 - Removing the Wireless Network Adapter; Wireless Network Adapter
Wireless Network Adapter : Dell Latitude C400 Service Manual Back to Contents Page Wireless Network Adapter Dell™ Latitude™ C400 Service Manual Removing the Wireless Network Adapter Replacing the Wireless Network Adapter Removing the Wireless Network Adapter NOTICE: Disconnect the computer and any a...
Page 28 - Replacing the Wireless Network Adapter
Wireless Network Adapter : Dell Latitude C400 Service Manual 1 wireless cables (2) 2 wireless cable connectors (2) 3. Disconnect the two wireless cables from the wireless card. 4. Spread the two metal securing tabs apart, and pull the card from its socket. Replacing the Wireless Network Adapter The ...
Page 30 - Display Assembly and Display Latch; Removing the Display Assembly
Display Assembly and Display Latch : Dell Latitude C400 Service Manual Back to Contents Page Display Assembly and Display Latch Dell™ Latitude™ C400 Service Manual Removing the Display Assembly Replacing the Display Latch Removing the Display Assembly NOTICE: You must remove the display assembly bef...
Page 33 - Replacing the Display Latch
Display Assembly and Display Latch : Dell Latitude C400 Service Manual Replacing the Display Latch 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 touchi...
Page 35 - Palm Rest; Removing the Palm Rest; Palm-Rest Screws on Bottom of Computer
Palm Rest : Dell Latitude C400 Service Manual Back to Contents Page Palm Rest Dell™ Latitude™ C400 Service Manual Removing the Palm Rest Replacing the Palm Rest Removing the Palm Rest NOTICE: Disconnect the computer and any attached devices from electrical outlets, and remove any installed batteries...
Page 36 - Critical Component Shield
Palm Rest : Dell Latitude C400 Service Manual 1 M2.5 x 6-mm screws (4) 2 M2.6 x 1.8-mm screws (4) 3 M2 x 4-mm screws (2) 4 M2.5 x 6-mm screws (2) 5. Remove the four M2.6 x 1.8-mm screws located inside the battery bay. 6. Remove the two M2.5 x 6-mm screws located near the service tag at the back edge...
Page 37 - Palm Rest Removal
Palm Rest : Dell Latitude C400 Service Manual 1 M2 x 4-mm screws (6) (one screw may be captive) 2 critical component shield 8. Remove the six M2 x 4-mm screws (one of which may be captive) that secure the critical component shield to the system board, and lift the shield away. NOTE: At this point, t...
Page 39 - Replacing the Palm Rest
Palm Rest : Dell Latitude C400 Service Manual Replacing the Palm Rest To aid with proper flex cable connection, a white locator line has been added near the ends of the flex cables. When replacing the LED and palm-rest flex cables, press the cable into the connector until the white line disappears a...
Page 40 - Cooling Fan; Removing the Cooling Fan; Cooling Fan Removal
Cooling Fan : Dell Latitude C400 Service Manual Back to Contents Page Cooling Fan Dell™ Latitude™ C400 Service Manual Removing the Cooling Fan Removing the Cooling Fan NOTICE: Disconnect the computer and any attached devices from electrical outlets, and remove any installed batteries. NOTICE: To avo...
Page 43 - Reserve Battery; Removing the Reserve Battery; Reserve Battery Removal
Reserve Battery : Dell Latitude C400 Service Manual Back to Contents Page Reserve Battery Dell™ Latitude™ C400 Service Manual Removing the Reserve Battery Replacing the Reserve Battery Removing the Reserve Battery NOTICE: The reserve battery provides power to the computer's RTC and NVRAM when the co...
Page 44 - Replacing the Reserve Battery
Reserve Battery : Dell Latitude C400 Service Manual 1 reserve battery connector on system board 2 reserve battery cable 3 reserve battery 5. Disconnect the reserve battery cable from the system board connector. 6. Pry the reserve battery free from the system board. The reserve battery is attached to...
Page 46 - Flashing the BIOS
Flashing the BIOS : Dell Latitude C400 Service Manual Back to Contents Page Flashing the BIOS Dell™ Latitude™ C400 Service Manual Perform the following steps to update the BIOS: 1. Make sure that the AC adapter is plugged in and that the main battery is installed properly. 2. Turn on the computer. T...
Page 48 - Audio Board; Removing the Audio Board; Audio Board Removal
Audio Board : Dell Latitude C400 Service Manual Back to Contents Page Audio Board Dell™ Latitude™ C400 Service Manual Removing the Audio Board Replacing the Audio Board Removing the Audio Board NOTICE: Disconnect the computer and any attached devices from electrical outlets, and remove any installed...
Page 50 - Replacing the Audio Board
Audio Board : Dell Latitude C400 Service Manual Replacing the Audio Board The audio board can be easily misaligned. When replacing it, first align the two screw holes in the board with the holes in the bosses. Then, as you press the audio board into the connector, sight sideways between the audio bo...
Page 51 - System Board; Removing the System Board
System Board : Dell Latitude C400 Service Manual Back to Contents Page System Board Dell™ Latitude™ C400 Service Manual Removing the System Board Replacing the System Board Removing the System Board The system board's BIOS chip contains the service tag sequence, which is also visible on a barcode la...
Page 52 - System Board Removal
System Board : Dell Latitude C400 Service Manual System Board Removal 1 fan 2 reserve battery cable 3 connector for fan extender cable 4 hard-drive connector 5 M2 x 4-mm screw (1) 6 memory module socket 7 guide pins (2) 8 5-mm hex nuts (4) 9 7-mm hex nuts (2) 10. Remove the four 5-mm hex nuts near e...
Page 53 - Replacing the System Board
System Board : Dell Latitude C400 Service Manual 12. Remove the two guide pins from the IDE connector. 13. Disconnect the cooling fan from the fan extender cable. 14. Disconnect the fan extender cable from the connector beside the internal memory socket. 15. Disconnect the reserve battery cable from...
Page 54 - Battery Latch; Removing the Battery Latch
Battery Latch : Dell Latitude C400 Service Manual Back to Contents Page Battery Latch Dell™ Latitude™ C400 Service Manual Removing the Battery Latch Replacing the Battery Latch Removing the Battery Latch NOTICE: Disconnect the computer and any attached devices from electrical outlets, and remove any...
Page 55 - Battery Latch Removal
Battery Latch : Dell Latitude C400 Service Manual Battery Latch Removal 1 tension spring 2 bottom case 3 battery latch 4 battery release-button tabs NOTICE: The tabs on the release button are plastic. When squeezing the tabs, be careful not to break them. 11. On the inside of the bottom case, use ne...
Page 56 - Replacing the Battery Latch
Battery Latch : Dell Latitude C400 Service Manual Replacing the Battery Latch 1. With the inside of the bottom case facing up, place the battery latch in position. 2. Turn the bottom case over and align the slot in the battery latch with the release- button slot in the bottom case. 3. Holding the ba...
Page 57 - Pin Assignments for I/O Connectors
Pin Assignments for I/O Connectors: Dell Latitude C400 Service Manual Back to Contents Page Pin Assignments for I/O Connectors Dell™ Latitude™ C400 Service Manual Serial Connector USB Connector Docking Connector IDE Module Bay Connector Video Connector Serial Connector Pin Signal 1 DCD 2 RXDA 3 TXDA...
Page 58 - Docking Connector
Pin Assignments for I/O Connectors: Dell Latitude C400 Service Manual Docking Connector Pin Signal 1 STRB#/5V 2 PD0 3 PD1 4 PD2 5 PD3 6 PD4 7 PD5 8 PD6 9 PD7 10 GND 11 DOCK_SPKR 12 DOCK_MIC 13 DOCK_LINE 14 DOCK_CDROM 15 GND 16 NC 17 POWER_SW# 18 QPCIEN# 19 S1.6M_EN# Pin Signal 51 HSYNC 52 VSYNC 53 G...
Page 60 - Video Connector; USB Connector
Pin Assignments for I/O Connectors: Dell Latitude C400 Service Manual 49 GND 50 LOW_PWR Video Connector Pin Signal 1 RED 2 GREEN 3 BLUE 4 NC 5 GND 6 GND 7 GND 8 GND Pin Signal 9 CRT_VCC 10 GND 11 NC 12 DAT_DDC2 13 HSYNC 14 VSYNC 15 CLK_DDC2 USB Connector file:///F|/Service%20Manuals/Dell/Latitude/c4...
Page 61 - IDE Module Bay Connector
Pin Assignments for I/O Connectors: Dell Latitude C400 Service Manual Pin Signal 1 VCC 2 –DATA 3 +DATA 4 GROUND IDE Module Bay Connector Pin Signal 1 BAY_MODPRES# 2 HDSEL# 3 RDATA# 4 WRPRT# 5 WRDATA# Pin Signal 35 WGATE# 36 GND 37 MTR0# 38 STEP# 39 DRV0# 40 GND 41 DIR# file:///F|/Service%20Manuals/D...
