Dell OptiPlex 7490 All-In-One Service Manual page 5

Installing the display panel......................................................................................................................................... 81
Middle frame.......................................................................................................................................................................84
Removing the middle frame...................................................................................................................................... 84
Installing the middle frame........................................................................................................................................ 86
Chapter 3: Drivers and downloads............................................................................................... 88
Chapter 4: System setup............................................................................................................. 89
BIOS overview................................................................................................................................................................... 89
Entering BIOS setup program........................................................................................................................................ 89
Boot Sequence...................................................................................................................................................................89
Navigation keys..................................................................................................................................................................89
System setup options.......................................................................................................................................................90
Updating the BIOS in Windows .................................................................................................................................... 98
Updating BIOS on systems with BitLocker enabled........................................................................................... 99
Updating your system BIOS using a USB flash drive..........................................................................................99
Updating the Dell BIOS in Linux and Ubuntu environments..................................................................................100
System and setup password.........................................................................................................................................100
Assigning a system setup password..................................................................................................................... 100
Deleting or changing an existing system setup password................................................................................ 101
Clearing CMOS settings................................................................................................................................................. 101
Clearing BIOS (System Setup) and System passwords..........................................................................................101
Chapter 5: Troubleshooting....................................................................................................... 102
Display built-in self test..................................................................................................................................................102
SupportAssist diagnostics............................................................................................................................................. 102
Running the SupportAssist Pre-Boot System Performance Check.............................................................. 102
Diagnostics........................................................................................................................................................................ 103
Recovering the operating system................................................................................................................................104
Flashing BIOS (USB key)............................................................................................................................................... 104
Flashing the BIOS............................................................................................................................................................ 104
WiFi power cycle..............................................................................................................................................................105
Flea power release.......................................................................................................................................................... 105
Chapter 6: Getting help and contacting Dell...............................................................................106
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