Dell Latitude 7400 2-in-1 Service Manual

Installing the fan.......................................................................................................................................................... 48
Speakers.............................................................................................................................................................................. 52
Removing the speakers..............................................................................................................................................52
Installing the speakers................................................................................................................................................53
Heatsink...............................................................................................................................................................................55
Removing the heatsink.............................................................................................................................................. 55
Installing the heatsink.................................................................................................................................................59
Display assembly................................................................................................................................................................63
Removing the display assembly............................................................................................................................... 63
Installing the display assembly................................................................................................................................. 66
Battery................................................................................................................................................................................. 68
Lithium-ion battery precautions...............................................................................................................................68
Removing the battery.................................................................................................................................................69
Installing the battery....................................................................................................................................................71
System board......................................................................................................................................................................73
Removing the system board..................................................................................................................................... 73
Installing the system board....................................................................................................................................... 78
Keyboard............................................................................................................................................................................. 83
Removing the keyboard............................................................................................................................................. 83
Installing the keyboard............................................................................................................................................... 88
Palmrest assembly............................................................................................................................................................ 92
Chapter 5: System setup.............................................................................................................95
BIOS overview................................................................................................................................................................... 95
Entering BIOS setup program........................................................................................................................................ 95
Boot menu...........................................................................................................................................................................95
Navigation keys..................................................................................................................................................................96
One time boot menu.........................................................................................................................................................96
Boot Sequence...................................................................................................................................................................96
System setup options.......................................................................................................................................................97
General options............................................................................................................................................................ 97
System configuration................................................................................................................................................. 98
Video screen options................................................................................................................................................ 100
Security........................................................................................................................................................................ 100
Secure boot.................................................................................................................................................................102
Intel Software Guard Extensions options............................................................................................................ 103
Performance............................................................................................................................................................... 103
Power management.................................................................................................................................................. 104
Post behavior..............................................................................................................................................................105
Manageability..............................................................................................................................................................106
Virtualization support................................................................................................................................................106
Wireless options......................................................................................................................................................... 106
Maintenance................................................................................................................................................................107
System logs................................................................................................................................................................. 107
Updating the BIOS.......................................................................................................................................................... 108
Updating the BIOS in Windows.............................................................................................................................. 108
Updating the BIOS in Linux and Ubuntu.............................................................................................................. 108
Updating the BIOS using the USB drive in Windows........................................................................................ 108
Updating the BIOS from the F12 One-Time boot menu...................................................................................109
System and setup password.........................................................................................................................................109
4
Contents

Dell Latitude 7400 2-in-1 Specifications

General

Storage	Up to 1TB PCIe NVMe SSD
Graphics	Intel UHD Graphics 620
Operating System	Windows 10 Pro
Processor	8th Generation Intel Core i5/i7
Display	14.0-inch FHD (1920 x 1080) Touchscreen
RAM	Up to 16GB
Battery	4-cell 52 Whr Integrated Battery
Weight	Starting at 1.36 kg (3.0 lbs)
Ports	1 x HDMI, 1 x microSD card reader, 1 x headphone/microphone combo jack
Wireless	Bluetooth 5.0
Dimensions	0.59 inches (14.89 mm)