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Dell Inspiron 14 5420 Service Manual - Page 51

Installing the power button with optional fingerprint reader

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Steps 1. Remove the screw (M2x3) that secures the power button with optional fingerprint reader to the palm-rest and keyboard assembly. 2. Lift the power button with optional fingerprint reader off the palm-rest and keyboard assembly. Installing the power button with optional fingerprint reader Prerequisites If you are replacing a component, remove the existing component before performing the installation process. About this task The following image(s) indicate the location of the power button with optional fingerprint reader and provides a visual representation of the installation procedure. Removing and installing components 51

Section	Page
Inspiron 14 5420 Service Manual	1
Contents	3
Working inside your computer	6
Before working inside your computer	6
Entering Service Mode	6
Safety instructions	6
Electrostatic discharge—ESD protection	7
ESD field service kit	8
Transporting sensitive components	9
Exiting Service Mode	9
After working inside your computer	9
Removing and installing components	10
Recommended tools	10
Screw list	10
Major components of Inspiron 14 5420	11
Base cover	13
Removing the base cover	13
Installing the base cover	16
Battery cable	17
Removing the battery cable	17
Installing the battery cable	18
Battery	19
Lithium-ion battery precautions	19
Removing the battery	20
Installing the battery	20
Coin-cell battery	21
Removing the coin-cell battery	21
Installing the coin-cell battery	22
Solid-state drive	23
Removing the M.2 2230 solid-state drive	23
Installing the M.2 2230 solid-state drive	25
Removing the M.2 2280 solid-state drive	26
Installing the M.2 2280 solid-state drive	27
Memory module	29
Removing the memory module	29
Installing the memory module	30
Wireless card	31
Removing the wireless card	31
Installing the wireless card	32
Power-adapter port	33
Removing the power-adapter port	33
Installing the power-adapter port	34
Display assembly	35
Removing the display assembly	35
Installing the display assembly	37
I/O board	39
Removing the I/O board	39
Installing the I/O board	40
Speakers	41
Removing the speakers	41
Installing the speakers	42
Touchpad	43
Removing the touchpad	43
Installing the touchpad	44
Fan	45
Removing the fan	45
Installing the fan	46
Heat sink	46
Removing the heat sink (UMA)	46
Installing the heat sink (UMA)	47
Removing the heat sink (discrete)	48
Installing the heat sink (discrete)	49
Power button with optional fingerprint reader	50
Removing the power button with optional fingerprint reader	50
Installing the power button with optional fingerprint reader	51
System board	52
Removing the system board	52
Installing the system board	55
Palm-rest and keyboard assembly	57
Removing the palm-rest and keyboard assembly	57
Installing the palm-rest and keyboard assembly	58
Drivers and downloads	60
System setup	61
Entering BIOS setup program	61
Navigation keys	61
Boot Sequence	62
System setup options	62
System and setup password	66
Assigning a system setup password	66
Deleting or changing an existing system setup password	67
Clearing CMOS settings	67
Clearing BIOS (System Setup) and System passwords	68
Updating the BIOS	68
Updating the BIOS in Windows	68
Updating the BIOS using the USB drive in Windows	68
Updating the BIOS in Linux and Ubuntu	68
Updating the BIOS from the F12 One-Time boot menu	69
Troubleshooting	70
Handling swollen Lithium-ion batteries	70
Locate the Service Tag or Express Service Code of your Dell computer	70
System-diagnostic lights	71
SupportAssist \| On-board Diagnostics	72
Recovering the operating system	72
WiFi power cycle	72
Drain residual flea power (perform hard reset)	73