Dell OptiPlex 5090 Tower Service Manual - Page 5

Updating the BIOS from the F12 One-Time boot menu

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80

System and setup password

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81

Assigning a system setup password

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81

Deleting or changing an existing system setup password

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81

Chapter 5: Troubleshooting

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83

SupportAssist diagnostics

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83

Diagnostic LED behavior

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83

Recovering the operating system

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84

Updating the BIOS in Windows

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85

Updating the BIOS using the USB drive in Windows

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85

Backup media and recovery options

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85

WiFi power cycle

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85

Drain residual flea power (perform hard reset)

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86

Chapter 6: Getting help and contacting Dell

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87

Contents

5

Section	Page
OptiPlex 5090 Tower Service Manual	1
Contents	3
Working inside your computer	6
Safety instructions	6
Before working inside your computer	6
Safety precautions	7
Electrostatic discharge—ESD protection	7
ESD field service kit	8
Transporting sensitive components	9
After working inside your computer	9
Removing and installing components	10
Recommended tools	10
Screw List	10
Major components of your system	11
Side cover	12
Removing the side cover	12
Installing the side cover	13
Front bezel	15
Removing the front bezel	15
Installing the front bezel	15
Fan duct	16
Removing the fan duct	16
Installing the fan duct	17
Hard-drive assembly	18
Removing the 2.5-inch hard-drive assembly	18
Removing the 2.5-inch hard-disk drive bracket	19
Installing the 2.5-inch hard-disk drive bracket	20
Installing the 2.5-inch hard-drive assembly	21
3.5 in. hard-drive assembly	22
Removing the 3.5-inch hard-disk drive assembly	22
Installing the 3.5-inch hard-disk drive assembly	23
Solid-state drive	24
Removing the M.2 2230 PCIe solid-state drive	24
Installing the M.2 2230 PCIe solid-state drive	25
Removing the M.2 2280 PCIe solid-state drive	26
Installing the M.2 2280 PCIe solid-state drive	27
Memory module	28
Removing the memory module	28
Installing the memory module	29
SD card reader (optional)	30
Removing the SD card reader	30
Installing the SD card reader	31
Processor fan and heat-sink assembly	32
Removing the processor fan and heat-sink assembly	32
Installing the processor fan and heat-sink assembly	33
Processor	34
Removing the processor	34
Installing the processor	35
Expansion card	37
Removing the graphics card	37
Installing the graphics card	38
Graphical processing unit	39
Removing the powered GPU	39
Installing the powered GPU	40
Coin-cell battery	41
Removing the coin-cell battery	41
Installing the coin-cell battery	41
WLAN card	42
Removing the WLAN card	42
Installing the WLAN card	43
Slim optical-drive	45
Removing the Slim optical drive	45
Installing the Slim optical drive	45
Speaker	46
Removing the speaker	46
Installing the speaker	47
Power button	48
Removing the power button	48
Installing the power button	49
Power-supply unit	50
Removing the power-supply unit	50
Installing the power-supply unit	52
Intrusion switch	54
Removing the intrusion switch	54
Installing the intrusion switch	55
Optional I/O modules (Type C/ HDMI/VGA/DP/Serial)	56
Removing optional I/O modules (Type-C/HDMI/VGA/DP/Serial)	56
Installing optional I/O modules (Type-C/HDMI/VGA/DP/Serial)	57
System board	58
Removing the system board	58
Installing the system board	63
Software	68
Drivers and downloads	68
System setup	69
Boot menu	69
Navigation keys	69
Boot Sequence	70
System setup options	70
Updating the BIOS	79
Updating the BIOS in Windows	79
Updating the BIOS in Linux and Ubuntu	79
Updating the BIOS using the USB drive in Windows	79
Updating the BIOS from the F12 One-Time boot menu	80
System and setup password	81
Assigning a system setup password	81
Deleting or changing an existing system setup password	81
Troubleshooting	83
SupportAssist diagnostics	83
Diagnostic LED behavior	83
Recovering the operating system	84
Updating the BIOS in Windows	85
Updating the BIOS using the USB drive in Windows	85
Backup media and recovery options	85
WiFi power cycle	85
Drain residual flea power (perform hard reset)	86

Dell OptiPlex 5090 Tower Service Manual - Page 5

Troubleshooting, Getting help and contacting Dell, Updating the BIOS in Windows

Page 5 highlights