Dell OptiPlex 5090 Small Form Factor Service Manual - Page 5

Troubleshooting, Getting help and contacting Dell

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Security...82 Passwords...84 Update Recovery...85 System Management...86 Keyboard...87 Virtualization...87 Performance...87 System Logs...88 Updating the BIOS...88 Updating the BIOS in Windows...88 Updating the BIOS in Linux and Ubuntu...89 Updating the BIOS using the USB drive in Windows 89 Updating the BIOS from the F12 One-Time boot menu 89 System and setup password...90 Assigning a system setup password...90 Deleting or changing an existing system setup password 91 Clearing CMOS settings...91 Clearing BIOS (System Setup) and System passwords 92 Chapter 5: Troubleshooting...93 Dell SupportAssist Pre-boot System Performance Check diagnostics 93 Running the SupportAssist Pre-Boot System Performance Check 93 Diagnostic LED behavior...93 Real-Time Clock (RTC Reset)...95 Recovering the operating system...95 Backup media and recovery options...95 WiFi power cycle...95 Drain residual flea power (perform hard reset)...95 Chapter 6: Getting help and contacting Dell 97 Contents 5

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Security
..........................................................................................................................................................................
82
Passwords
.....................................................................................................................................................................
84
Update Recovery
.........................................................................................................................................................
85
System Management
..................................................................................................................................................
86
Keyboard
........................................................................................................................................................................
87
Virtualization
.................................................................................................................................................................
87
Performance
.................................................................................................................................................................
87
System Logs
.................................................................................................................................................................
88
Updating the BIOS
............................................................................................................................................................
88
Updating the BIOS in Windows
................................................................................................................................
88
Updating the BIOS in Linux and Ubuntu
................................................................................................................
89
Updating the BIOS using the USB drive in Windows
..........................................................................................
89
Updating the BIOS from the F12 One-Time boot menu
.....................................................................................
89
System and setup password
..........................................................................................................................................
90
Assigning a system setup password
.......................................................................................................................
90
Deleting or changing an existing system setup password
..................................................................................
91
Clearing CMOS settings
...................................................................................................................................................
91
Clearing BIOS (System Setup) and System passwords
..........................................................................................
92
Chapter 5: Troubleshooting
.........................................................................................................
93
Dell SupportAssist Pre-boot System Performance Check diagnostics
................................................................
93
Running the SupportAssist Pre-Boot System Performance Check
................................................................
93
Diagnostic LED behavior
..................................................................................................................................................
93
Real-Time Clock (RTC Reset)
........................................................................................................................................
95
Recovering the operating system
.................................................................................................................................
95
Backup media and recovery options
.............................................................................................................................
95
WiFi power cycle
...............................................................................................................................................................
95
Drain residual flea power (perform hard reset)
.........................................................................................................
95
Chapter 6: Getting help and contacting Dell
................................................................................
97
Contents
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