Dell Inspiron 14 5420 Service Manual - Page 4

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 Chapter 3: Drivers and downloads 60 Chapter 4: 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 Chapter 5: 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 4 Contents