Dell Inspiron 5491 2n1 Service Manual page 4

Entering BIOS setup program............................................................................................................................................50
System setup options......................................................................................................................................................... 50
Clearing CMOS settings..................................................................................................................................................... 57
Clearing BIOS (System Setup) and System passwords.................................................................................................57
5 Troubleshooting.........................................................................................................................59
Enhanced Pre-Boot System Assessment (ePSA) diagnostics......................................................................................59
Running the ePSA diagnostics.....................................................................................................................................59
Diagnostics........................................................................................................................................................................... 59
Recovering the operating system..................................................................................................................................... 60
Flashing the BIOS................................................................................................................................................................60
Enabling Intel Optane memory........................................................................................................................................... 61
Disabling Intel Optane memory...........................................................................................................................................61
Flashing BIOS (USB key).................................................................................................................................................... 61
WiFi power cycle.................................................................................................................................................................. 61
Flea power release...............................................................................................................................................................62
6 Getting help and contacting Dell..................................................................................................63
4 Contents