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Dell Vostro 5490 Service Manual - Page 38

Touchpad, Removing the touchpad

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3. Replace the two (M2x3) screws to secure the system fan to the palmrest assembly. 4. Connect the system fan cable to the connector on the system board. 5. Route the input and output board cable through the retention clip and connect the input and output board cable to the connector on the system board. Next steps 1. Install the battery. 2. Install the base cover. 3. Follow the procedure in After working inside your computer. Touchpad Removing the touchpad Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the base cover. 3. Remove the battery. About this task The figure indicates the location of the touchpad and provides a visual representation of the removal procedure. 38 Removing and installing components

Section	Page
Dell Vostro 5490 Service Manual	3
Working on your computer	6
Safety instructions	6
Turning off your computer — Windows 10	6
Before working inside your computer	7
After working inside your computer	7
Removing and installing components	8
Recommended tools	8
Screw List	8
Base cover	9
Removing the base cover	9
Installing the base cover	11
Battery	13
Lithium-ion battery precautions	13
Removing the battery	14
Installing the battery	15
Memory modules	15
Removing the secondary memory module	15
Installing the secondary memory module	16
Hard drive	17
Removing the hard drive	17
Installing the hard drive	18
Solid state drive	19
Removing the M.2 2230 solid-state drive	19
Removing the M.2 2242 solid-state drive	20
Removing the M.2 2280 solid-state drive	21
Replacing the SSD support bracket	21
Installing M.2 2230 solid-state drive	22
Installing M.2 2242 solid-state drive	23
Installing M.2 2280 solid-state drive	24
WLAN card	25
Removing the WLAN card	25
Installing the WLAN card	26
Coin-cell battery	27
Removing the coin-cell battery	27
Installing the coin-cell battery	28
Speakers	29
Removing the speakers	29
Installing the speakers	30
Input and output board	32
Removing the input and output board	32
Installing the input and output board	33
Heatsink—discrete	34
Removing the heatsink assembly-discrete	34
Installing the heatsink assembly-discrete	35
System fan	36
Removing the system fan	36
Installing the system fan	37
Touchpad	38
Removing the touchpad	38
Installing the touchpad	39
Power-adapter port	41
Removing the power-adapter port	41
Installing the power-adapter port	42
System board	43
Removing the system board	43
Installing the system board	44
Power button	47
Removing the power button	47
Installing the power button	48
Power button with fingerprint reader	50
Removing the power button with fingerprint reader	50
Installing the power button with fingerprint reader	51
Display assembly	52
Removing the display assembly	52
Installing the display assembly	56
Palmrest assembly	59
Replacing the palmrest assembly	59
System setup	61
Boot menu	61
Navigation keys	61
Boot Sequence	62
System setup options	62
Overview	62
Boot options	63
System information	63
Video	65
Security	65
Passwords	66
Secure boot	67
Performance	67
Power management	68
Wireless	69
POST behavior	69
Virtualization support	69
Maintenance	70
System logs	70
Updating the BIOS in Windows	70
Updating BIOS on systems with BitLocker enabled	71
Updating your system BIOS using a USB flash drive	71
System and setup password	72
Assigning a system setup password	72
Deleting or changing an existing system setup password	73
Troubleshooting	74
Enhanced Pre-Boot System Assessment (ePSA) diagnostics	74
Running the ePSA diagnostics	74
Diagnostics	74
M-BIST	75
L-BIST	75
System diagnostic lights	75
WiFi power cycle	76
Getting help	77