Dell OptiPlex 5090 Small Form Factor Service Manual page 5

Updating BIOS on systems with BitLocker enabled............................................................................................84
Updating your system BIOS using a USB flash drive..........................................................................................84
System and setup password...........................................................................................................................................85
Assigning a system setup password....................................................................................................................... 85
Deleting or changing an existing system setup password.................................................................................86
Chapter 5: Troubleshooting......................................................................................................... 87
Dell SupportAssist Pre-boot System Performance Check diagnostics................................................................87
Running the SupportAssist Pre-Boot System Performance Check................................................................ 87
System diagnostic lights.................................................................................................................................................. 87
Real-Time Clock (RTC Reset)........................................................................................................................................89
Flashing the BIOS..............................................................................................................................................................89
Flashing BIOS (USB key)................................................................................................................................................ 90
WiFi power cycle............................................................................................................................................................... 90
Chapter 6: Getting help and contacting Dell.................................................................................91
Contents 5