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Dell Vostro 5402 Service Manual - Page 14

Table 1. Screw list continued, Component, Screw type, Quantity, Screw image

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Table 1. Screw list (continued) Component Screw type Quantity Battery WLAN Solid-state drive -1 Solid-state drive - 2 Solid-state drive -2 support bracket System fan Heat sink - UMA M2x3 4 M2x3 1 M2x3 1 M2x3 2 M1.6x2 1 M2x2 2 M2x5.35 - captive 4 Heat sink - discrete M2x5.35 - captive 7 Hinge screws M2.5x4 3 M2x3 1 I/O board M2x3 3 Power button with fingerprint M2x2.5 2 reader DC-in port M2x3 1 Touchpad 1.6x2 3 M2x2 2 Display assembly M2.5x4 3 M2x3 1 System board M2x3 2 Screw image 14 Disassembly and reassembly

Section	Page
Vostro 5402 Service Manual	3
Working on your computer	7
Safety instructions	7
Before working inside your computer	7
Safety precautions	8
Electrostatic discharge—ESD protection	8
ESD field service kit	9
After working inside your computer	10
Major components of your system	11
Disassembly and reassembly	13
Recommended tools	13
Screw list	13
Base cover	15
Removing the base cover	15
Installing the base cover	16
Battery	18
Lithium-ion battery precautions	18
Removing the 3-cell battery - UMA/discrete	19
Installing the 3-cell battery - UMA/discrete	20
Removing the 4-cell battery - UMA/discrete	21
Installing the 4-cell battery - UMA/discrete	21
WLAN card	22
Removing the WLAN card - UMA	22
Installing the WLAN card - UMA	23
Removing the WLAN card - discrete	24
Installing the WLAN card - discrete	25
Memory modules	26
Removing the memory modules - UMA	26
Installing the memory modules - UMA	27
Removing the memory modules - discrete	28
Installing the memory modules - discrete	29
Solid-state drive	31
Removing the M.2 2280 solid-state drive - UMA	31
Installing the M.2 2280 solid-state drive - UMA	31
Removing the M.2 2230 solid-state drive - UMA	32
Installing the M.2 2230 solid-state drive - UMA	33
Removing the M.2 2280 solid-state drive - SSD-1 - discrete	34
Installing the M.2 2280 solid-state drive - SSD-1 - discrete	35
Removing the M.2 2230 solid-state drive - SSD-1 - discrete	36
Installing the M.2 2230 solid-state drive - SSD-1 - discrete	37
Replacing the SSD-1 support bracket	38
Removing the M.2 2280 solid-state drive - SSD-2 - discrete	39
Installing the M.2 2280 solid-state drive - SSD-2 - discrete	40
Speakers	41
Removing the speakers (in 3-cell battery configuration)	41
Installing the speakers (in 3-cell battery configuration)	42
Removing the speakers (in 4-cell battery configuration)	43
Installing the speakers (in 4-cell battery configuration)	44
System fan	46
Removing the system fan - UMA	46
Installing the system fan - UMA	47
Removing the system fan - discrete	48
Installing the system fan - discrete	49
Heat sink	50
Removing the heat sink - UMA	50
Installing the heat sink - UMA	51
Removing the heat sink - discrete	51
Installing the heat sink - discrete	52
Coin-cell battery	53
Removing the coin-cell battery - UMA	53
Installing the coin-cell battery - UMA	54
Removing the coin-cell battery - discrete	55
Installing the coin-cell battery - discrete	55
I/O board	56
Removing the I/O board - UMA	56
Installing the I/O board - UMA	57
Removing the I/O board - discrete	59
Installing the I/O board - discrete	60
Power button with fingerprint reader (optional)	61
Removing the power button and optional fingerprint reader - UMA	61
Installing the power button with finger reader - UMA	62
Removing the power button and optional fingerprint reader - discrete	63
Installing the power button with finger reader - discrete	63
DC-in port	64
Removing the DC-in port - UMA	64
Installing the DC-in port - UMA	65
Removing the DC-in port - discrete	66
Installing the DC-in port - discrete	67
Touchpad	68
Removing the touchpad - UMA	68
Installing the touchpad - UMA	70
Removing the touchpad - discrete	71
Installing the touchpad - discrete	72
Display assembly	73
Removing the display assembly - UMA	73
Installing the display assembly - UMA	75
Removing the display assembly - discrete	76
Installing the display assembly - discrete	79
System board	81
Removing the system board - UMA	81
Installing the system board - UMA	83
Removing the system board - discrete	86
Installing the system board - discrete	88
Palm-rest and keyboard assembly	91
Removing the palm-rest and keyboard assembly - UMA	91
Installing the palm-rest and keyboard assembly - UMA	92
Removing the palm-rest and keyboard assembly - discrete	93
Installing the palm-rest and keyboard assembly - discrete	94
Software	96
Downloading Windows drivers	96
System setup	97
Boot menu	97
Navigation keys	97
Boot Sequence	98
BIOS setup	98
Overview	98
Boot configuration	99
Integrated Devices	100
Storage	101
Display	101
Connection options	102
Power management	102
Security	103
Password	104
Update and Recovery	106
System management	106
Keyboard	107
Pre-boot behavior	108
Virtualization support	109
Performance	109
System logs	110
Updating the BIOS in Windows	110
Updating BIOS on systems with BitLocker enabled	111
Updating the Dell BIOS in Linux and Ubuntu environments	111
Flashing the BIOS from the F12 One-Time boot menu	111
System and setup password	116
Assigning a system setup password	117
Deleting or changing an existing system setup password	117
Troubleshooting	118
Built-in self-test (BIST)	118
System board built-in self-test (M-BIST)	119
Display panel power rail built-in self-test (L-BIST)	119
Display panel power rail built-in self-test (L-BIST)	120
Display panel built-in self-test (LCD-BIST)	120
Outcome	121
SupportAssist diagnostics	121
Running the SupportAssist diagnostics	121
System diagnostic lights	121
Recovering the operating system	123
Flashing the BIOS	123
Flashing BIOS (USB key)	123
Backup media and recovery options	124
WiFi power cycle	124
Releasing Ethernet (RJ-45) cable	124
Getting help	125