Dell OptiPlex 7480 All-In-One Service Manual page 5

Middle frame........................................................................................................................................................................ 84
Removing the middle frame......................................................................................................................................... 84
Installing the middle frame............................................................................................................................................86
3 Software................................................................................................................................... 88
Operating system................................................................................................................................................................ 88
Downloading the drivers..................................................................................................................................................... 88
4 System setup.............................................................................................................................89
BIOS overview..................................................................................................................................................................... 89
Entering BIOS setup program............................................................................................................................................89
Navigation keys....................................................................................................................................................................89
Boot Sequence.................................................................................................................................................................... 89
System setup options......................................................................................................................................................... 90
System and setup password..............................................................................................................................................96
Assigning a system setup password............................................................................................................................97
Deleting or changing an existing system setup password........................................................................................97
5 Troubleshooting......................................................................................................................... 98
Dell SupportAssist Pre-boot System Performance Check diagnostics........................................................................98
Running the SupportAssist Pre-Boot System Performance Check....................................................................... 98
Display built-in self test.......................................................................................................................................................98
Diagnostics........................................................................................................................................................................... 99
Recovering the operating system....................................................................................................................................100
Flashing BIOS (USB key).................................................................................................................................................. 100
Flashing the BIOS.............................................................................................................................................................. 100
WiFi power cycle.................................................................................................................................................................101
Flea power release..............................................................................................................................................................101
6 Getting help and contacting Dell................................................................................................ 102
Contents 5