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Dell OptiPlex 5090 Small Form Factor Service Manual - Page 56

Removing the system board, PCIe x16 Slot2 and PCIe x4 Slot1

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10. SATA 0 connector 11. SATA 1 connector 12. ATX system power connector 13. SATA 3 connector 14. Internal speaker cable connector 15. Coin-cell battery 16. PCIe x16 (Slot2) and PCIe x4 (Slot1) 17. PS/2 KB/Mouse Connector 18. Processor socket Removing the system board Prerequisites 1. Follow the procedure in before working inside your computer. 2. Remove the side cover. 3. Remove the front bezel. 4. Remove the 2.5/3.5-inch hard-drive caddy. 5. Remove the graphics card. 6. Remove the solid-state drive. 7. Remove the WLAN card. 8. Remove the fan assembly. 9. Remove the memory modules. 10. Remove the processor. About this task The following images indicate the location of the system board and provide a visual representation of the removal procedure. 56 Removing and installing components

Section	Page
OptiPlex 5090 Small Form Factor 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	14
Intrusion switch	15
Removing the intrusion switch	15
Installing the intrusion switch	15
Front bezel	16
Removing the front bezel	16
Installing the front bezel	17
Hard drive	19
Removing the 2.5/3.5-inch hard-drive caddy	19
Removing the 2.5-inch hard-drive	20
Installing the 2.5/3.5-inch hard-drive caddy	21
Installing the 2.5-inch hard-drive	22
Solid-state drive	23
Removing the M.2 2230 solid-state drive	23
Installing the M.2 2230 solid-state drive	24
Removing the M.2 2280 solid-state drive	25
Installing the M.2 2280 solid-state drive	26
Optical drive	27
Removing the hard-drive and optical-drive bracket	27
Installing the hard-drive and optical-drive bracket	29
Removing the slim optical-drive	31
Installing the slim optical-drive	32
SD-card reader	33
Removing the SD-card reader	33
Installing the SD-card reader	34
WLAN card	35
Removing the WLAN card	35
Installing the WLAN card	36
Fan and heat-sink assembly	38
Removing the fan and heat-sink assembly	38
Installing the fan and heat-sink assembly	38
Graphics card	39
Removing the graphics card	39
Installing the graphics card	40
Coin-cell battery	41
Removing the coin-cell battery	41
Installing the coin-cell battery	42
Memory modules	43
Removing the memory modules	43
Installing the memory modules	44
Processor	45
Removing the processor	45
Installing the processor	46
Power button	48
Removing the power button	48
Installing the power button	48
Power-supply unit	49
Removing the power-supply unit	49
Installing the power-supply unit	52
System board	55
System board callouts - 5090 Small Form Factor	55
Removing the system board	56
Installing the system board	59
Software	64
Drivers and downloads	64
System setup	65
Boot menu	65
Navigation keys	65
Boot Sequence	66
System setup options	66
Overview	70
Boot Configuration	72
Integrated Devices	73
Storage	74
Display	75
Connection	75
Power	76
Security	77
Passwords	79
Update Recovery	80
System Management	81
Keyboard	82
Virtualization	82
Performance	82
System Logs	83
Updating the BIOS in Windows	83
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
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