Dell OptiPlex 5055 User Manual
Dell OptiPlex 5055 Small Form Factor
Owner's Manual
Regulatory Model: D11S
Regulatory Type: D11S003
Notes, cautions, and warnings
NOTE: A NOTE indicates important information that helps you make better use of your product.
CAUTION: A CAUTION indicates either potential damage to hardware or loss of data and tells you how to avoid the problem. 
WARNING: A WARNING indicates a potential for property damage, personal injury, or death.
© 2018 2018 Dell Inc. or its subsidiaries. All rights reserved. Dell, EMC, and other trademarks are trademarks of Dell Inc. or its subsidiaries. Other trademarks may be trademarks of their respective owners.
2018 - 02
Rev. A00
Contents
1 Working on your computer............................................................................................................................. |
6 |
Safety instructions............................................................................................................................................................. |
6 |
Turning o• your computer................................................................................................................................................ |
6 |
Turning o• your — Windows..................................................................................................................................... |
6 |
Before working inside your computer.............................................................................................................................. |
7 |
After working inside your computer................................................................................................................................. |
7 |
2 Chassis.......................................................................................................................................................... |
8 |
Front chassis view.............................................................................................................................................................. |
8 |
Back chassis view ............................................................................................................................................................. |
9 |
3 Disassembly and reassembly........................................................................................................................ |
10 |
Back cover......................................................................................................................................................................... |
10 |
Removing cover.......................................................................................................................................................... |
10 |
Installing cover............................................................................................................................................................. |
11 |
Front Bezel......................................................................................................................................................................... |
11 |
Removing the front bezel........................................................................................................................................... |
11 |
Installing front bezel.................................................................................................................................................... |
12 |
Storage device.................................................................................................................................................................. |
12 |
Removing 2.5–inch hard drive assembly................................................................................................................. |
12 |
Removing 2.5–inch hard drive from the hard drive bracket................................................................................. |
14 |
Installing 2.5–inch hard drive into the hard drive bracket..................................................................................... |
15 |
Installing 2.5–inch hard drive assembly................................................................................................................... |
15 |
Expansion card.................................................................................................................................................................. |
15 |
Removing PCIe expansion card................................................................................................................................ |
15 |
Installing PCIe expansion card................................................................................................................................... |
17 |
Cooling shroud................................................................................................................................................................... |
17 |
Removing the cooling shroud.................................................................................................................................... |
17 |
Installing cooling shroud............................................................................................................................................. |
19 |
Coin-cell battery............................................................................................................................................................... |
19 |
Removing coin cell battery........................................................................................................................................ |
19 |
Installing coin cell battery.......................................................................................................................................... |
20 |
Optical drive...................................................................................................................................................................... |
20 |
Removing optical drive.............................................................................................................................................. |
20 |
Installing optical drive................................................................................................................................................ |
22 |
M.2 PCIe SSD................................................................................................................................................................... |
23 |
Removing M.2 PCIe SSD.......................................................................................................................................... |
23 |
Installing M.2 PCIe SSD............................................................................................................................................. |
24 |
Heat sink assembly.......................................................................................................................................................... |
24 |
Removing heat sink assembly................................................................................................................................... |
24 |
Installing heat sink assembly..................................................................................................................................... |
25 |
Processor.......................................................................................................................................................................... |
25 |
Removing the processor........................................................................................................................................... |
25 |
Contents 3
Installing the processor............................................................................................................................................. |
26 |
Intrusion switch................................................................................................................................................................ |
27 |
Removing intrusion switch........................................................................................................................................ |
27 |
Installing intrusion switch.......................................................................................................................................... |
28 |
Memory modules............................................................................................................................................................. |
28 |
Removing memory module....................................................................................................................................... |
28 |
Installing memory module.......................................................................................................................................... |
28 |
VGA Daughterboard........................................................................................................................................................ |
29 |
Removing the VGA daughter board........................................................................................................................ |
29 |
Installing the VGA daughter board........................................................................................................................... |
29 |
SD card.............................................................................................................................................................................. |
29 |
Removing SD card reader......................................................................................................................................... |
29 |
Installing SD card reader........................................................................................................................................... |
30 |
Power supply unit............................................................................................................................................................ |
30 |
Removing power supply unit — PSU...................................................................................................................... |
30 |
Installing power supply unit — PSU........................................................................................................................ |
33 |
Power switch.................................................................................................................................................................... |
33 |
Removing power switch............................................................................................................................................ |
33 |
Installing power switch.............................................................................................................................................. |
34 |
Speaker............................................................................................................................................................................. |
35 |
Removing speaker..................................................................................................................................................... |
35 |
Installing speaker........................................................................................................................................................ |
35 |
System board.................................................................................................................................................................... |
36 |
Removing the system board..................................................................................................................................... |
36 |
Installing the system board....................................................................................................................................... |
40 |
System board layout................................................................................................................................................... |
41 |
4 Technology and components........................................................................................................................ |
43 |
Systems management features...................................................................................................................................... |
43 |
In-Band Systems Management – Dell Client Command Suite................................................................................... |
43 |
Out-of-Band Systems Management – DASH.............................................................................................................. |
44 |
AMD APUs, AMD Ryzen CPUs and APUs.................................................................................................................... |
44 |
AMD Advanced Processing Unit - APU.................................................................................................................. |
44 |
AMD Ryzen................................................................................................................................................................. |
44 |
AMD Ryzen APUs...................................................................................................................................................... |
45 |
AMD PT B350.................................................................................................................................................................. |
45 |
AMD B350.................................................................................................................................................................. |
45 |
Specification............................................................................................................................................................... |
45 |
AMD Radeon R7 M450................................................................................................................................................... |
45 |
Key Specifications...................................................................................................................................................... |
45 |
AMD Radeon R5 M430................................................................................................................................................... |
46 |
Key Specifications...................................................................................................................................................... |
46 |
USB features.................................................................................................................................................................... |
46 |
USB 3.1 Gen 1 (SuperSpeed USB)........................................................................................................................... |
47 |
Speed........................................................................................................................................................................... |
47 |
Applications................................................................................................................................................................. |
48 |
Compatibility............................................................................................................................................................... |
48 |
4 Contents
DDR4................................................................................................................................................................................. |
49 |
DDR4 Details............................................................................................................................................................... |
49 |
Memory Errors........................................................................................................................................................... |
50 |
Active State Power Management................................................................................................................................. |
50 |
5 System setup............................................................................................................................................... |
51 |
Boot menu......................................................................................................................................................................... |
51 |
System Setup options...................................................................................................................................................... |
51 |
Updating the BIOS in Windows ..................................................................................................................................... |
57 |
Updating BIOS on systems with BitLocker enabled.............................................................................................. |
58 |
Updating your system BIOS using a USB flash drive............................................................................................ |
58 |
Updating the Dell BIOS in Linux and Ubuntu environments....................................................................................... |
58 |
Flashing the BIOS from the F12 One-Time boot menu............................................................................................... |
59 |
Specifications................................................................................................................................................................... |
62 |
6 Troubleshooting........................................................................................................................................... |
67 |
Diagnostic and Power LED codes.................................................................................................................................. |
67 |
Enhanced Pre-Boot System Assessment — ePSA diagnostics................................................................................. |
71 |
7 Getting help................................................................................................................................................. |
72 |
Contacting Dell................................................................................................................................................................. |
72 |
Contents 5
1
Working on your computer
Safety instructions
Use the following safety guidelines to protect your computer from potential damage and to ensure your personal safety. Unless otherwise noted, each procedure included in this document assumes that the following conditions exist:
•You have read the safety information that shipped with your computer.
•A component can be replaced or, if purchased separately, installed by performing the removal procedure in reverse order.
WARNING: Disconnect all power sources before opening the computer cover or panels. After you finish working inside the computer, replace all covers, panels, and screws before connecting to the power source.
WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best practices information, see the Regulatory Compliance Homepage at www.Dell.com/regulatory_compliance
CAUTION: Many repairs may only be done by a certified service technician. You should only perform troubleshooting and simple repairs as authorized in your product documentation, or as directed by the online or telephone service and support team. Damage due to servicing that is not authorized by Dell is not covered by your warranty. Read and follow the safety instructions that came with the product.
CAUTION: To avoid electrostatic discharge, ground yourself by using a wrist grounding strap or by periodically touching an unpainted metal surface at the same time as touching a connector on the back of the computer.
CAUTION: Handle components and cards with care. Do not touch the components or contacts on a card. Hold a card by its edges or by its metal mounting bracket. Hold a component such as a processor by its edges, not by its pins.
CAUTION: When you disconnect a cable, pull on its connector or on its pull-tab, not on the cable itself. Some cables have connectors with locking tabs; if you are disconnecting this type of cable, press in on the locking tabs before you disconnect the cable. As you pull connectors apart, keep them evenly aligned to avoid bending any connector pins. Also, before you connect a cable, ensure that both connectors are correctly oriented and aligned.
NOTE: The color of your computer and certain components may appear differently than shown in this document.
Turning off your computer
Turning off your — Windows
CAUTION: To avoid losing data, save and close all open files and exit all open programs before you turn off your computer .
1Click or tap 
.
2Click or tap 
and then click or tap Shut down.
NOTE: Ensure that the computer and all attached devices are turned off. If your computer and attached devices did not automatically turn off when you shut down your operating system, press and hold the power button for about 6 seconds to turn them off.
6 Working on your computer
Before working inside your computer
To avoid damaging your computer, perform the following steps before you begin working inside the computer.
1Ensure that you follow the Safety Instruction.
2Ensure that your work surface is flat and clean to prevent the computer cover from being scratched.
3Turn o• your computer.
4Disconnect all network cables from the computer.
CAUTION: To disconnect a network cable, first unplug the cable from your computer and then unplug the cable from the network device.
5Disconnect your computer and all attached devices from their electrical outlets.
6Press and hold the power button while the computer is unplugged to ground the system board.
NOTE: To avoid electrostatic discharge, ground yourself by using a wrist grounding strap or by periodically touching an unpainted metal surface at the same time as touching a connector on the back of the computer.
After working inside your computer
After you complete any replacement procedure, ensure that you connect any external devices, cards, and cables before turning on your computer.
1 Connect any telephone or network cables to your computer.
CAUTION: To connect a network cable, first plug the cable into the network device and then plug it into the computer.
2Connect your computer and all attached devices to their electrical outlets.
3Turn on your computer.
4If required, verify that the computer works correctly by running ePSA diagnostics.
Working on your computer |
7 |
2
Chassis
Front chassis view
1 |
Power button and power light |
2 |
Hard drive activity light |
3 |
Memory card reader (optional) |
4 |
Optical drive (optional) |
5 |
Headset port |
6 |
USB 2.0 port with PowerShare |
7 |
USB 2.0 port |
8 |
USB 3.1 Gen1 port |
8 Chassis
Back chassis view
1 |
Line-out port |
2 |
DisplayPort |
3 |
Serial port |
4 |
PS/2 keyboard port |
5 |
USB 3.1 Gen1 port |
6 |
USB 2.0 ports (supports Smart Power On) |
7 |
Expansion card slots |
8 |
Power connector port |
9 |
Power supply diagnostic light |
10 |
Padlock ring |
11 |
Kensington security cable slot |
12 |
Network port |
13 |
PS/2 mouse port |
14 |
VGA connector port (optional) |
15 |
Release latch |
16 |
Cable cover lock slot |
Chassis 9
3
Disassembly and reassembly
Back cover
Removing cover
1Follow the procedure in Before working inside your computer.
2To release cover:
aSlide the blue retention tab to the right to unlock the cover [1].
bSlide the cover toward the back of the computer [2].
3 Lift the cover to remove it from the computer.
10 Disassembly and reassembly
Installing cover
1Place the cover on the computer and slide the cover forward until it clicks into place.
2Follow the procedure in After working inside your computer.
Front Bezel
Removing the front bezel
1Follow the procedure in Before working inside your computer.
2Remove the cover.
3To remove front bezel:
aLift the tabs to release the bezel from the chassis [1].
bRemove the front bezel from the computer [2].
NOTE: Please ensure that the tabs at the bottom of the bezel is also released before lifting the bezel.
Disassembly and reassembly |
11 |
Installing front bezel
1Insert the tabs of the bezel into the slots on the chassis.
2Press the bezel until the tabs click into place.
3Install the cover.
4Follow the procedure in After working inside your computer.
Storage device
Removing 2.5–inch hard drive assembly
1Follow the procedure in Before working inside your computer.
2Remove the cover.
3To remove the 2.5-inch drive assembly:
aDisconnect the SATA cable and power cable from the drive [1].
bPush the tab to release drive assembly from the chassis [2].
12 Disassembly and reassembly
4 Slide and lift the hard drive assembly from the computer.
Disassembly and reassembly |
13 |
Removing 2.5–inch hard drive from the hard drive bracket
1Follow the procedure in Before working inside your computer.
2Remove the:
acover
b2.5 inch hard drive assembly
3 To remove hard drive bracket:
aPull one side of the hard drive bracket to disengage the pins on the bracket from the slots on the hard drive [1].
bLift the drive out of the 2.5-inch drive bracket [2].
14 Disassembly and reassembly
Installing 2.5–inch hard drive into the hard drive bracket
1Flex the side of the hard drive bracket, to align and insert the pins on the bracket into the hard drive.
2Insert the hard drive into the hard drive bracket until it clicks into place.
3Install the:
a2.5 inch hard drive assembly
bcover
4 Follow the procedure in After working inside your computer.
Installing 2.5–inch hard drive assembly
1Insert the drive assembly into the slot on the computer until it clicks into place.
2Connect the SATA cable and the power cable to the connectors on the hard drive.
3Install the cover.
4Follow the procedure in After working inside your computer.
Expansion card
Removing PCIe expansion card
1Follow the procedure in Before working inside your computer.
2Remove the:
acover
bfront bezel
3 Pull the metal tab to open the expansion card latch.
Disassembly and reassembly |
15 |
4 To remove the PCIe expansion card:
aPull the release latch to unlock the PCIe expansion card [1].
bPush the release tab [2] and lift the PCIe expansion card out of the computer [3].
NOTE: The release tab is at the base of the expansion card.
16 Disassembly and reassembly
5 Repeat the steps to remove any additional PCIe expansion cards.
Installing PCIe expansion card
1Insert the expansion card into the connector on the system board.
2Press the expansion card until it clicks into place.
3Close the expansion card latch and press it until it clicks into place.
4Install the:
afront bezel
bcover
5 Follow the procedure in After working inside your computer.
Cooling shroud
Removing the cooling shroud
NOTE: Cooling shroud is encompasses the processor assembly and it must be removed to access the processor.
1Follow the procedure in Before working inside your computer.
2Remove the cover.
3To remove cooling shroud:
a Holding the touch points, pull the fan duct bracker outwards to release the cooling shroud.
Disassembly and reassembly |
17 |
NOTE: Illustration on how to remove the shroud is also given on the shroud. b Lift the cooling shroud away from the chassis.
18 Disassembly and reassembly
Installing cooling shroud
NOTE: When inserting the shroud on the processor assembly, please ensure that the data and power cables of the optical drive do not get caught inside the shroud.
1Align the slots on the cooling shroud, with the screws on the heat sink.
2Insert the cooling shroud over the processor assembly.
3Install the cover.
4Follow the procedure in After working inside your computer.
Coin-cell battery
Removing coin cell battery
1Follow the procedure in Before working inside your computer.
2Remove the:
acover
bcooling shroud
cexpansion card
3 To remove the coin cell battery:
a Using a plastic scribe press the release latch until the coin cell battery pops out [1].
Disassembly and reassembly |
19 |
b Remove the coin cell battery from the connector on the system board [2].
Installing coin cell battery
1Hold the coin cell battery with the "+" sign facing up and slide it under the securing tabs at the positive side of the connector.
2Press the battery into the connector until it locks into place.
3Install the:
aexpansion card
bcooling shroud
ccover
4 Follow the procedure in After working inside your computer.
Optical drive
Removing optical drive
1Follow the procedure in Before working inside your computer.
2Remove the:
acover
bfront bezel
ccooling shroud
20 Disassembly and reassembly
d 2.5 inch hard drive assembly 3 To remove optical drive:
aRelease the cables from the retention clip [1].
bSlide the blue tab to unlock the optical drive assembly [2].
4 To remove the optical drive assembly:
aPull the tab upward to release the assembly [1].
bHolding the tab, disconnect the optical drive cables [2].
cSlide and lift the optical drive assembly away from the computer [3].
Disassembly and reassembly |
21 |
NOTE: After releasing the Optical drive, you can also …ip the drive assembly for easy access to the drive cables.
NOTE: The Optical drive cables are available on side of the drive assembly.
5 To remove the optical drive:
aSlide the tab to release the optical drive [1].
bPush the optical drive away from the assembly [2][3].
Installing optical drive
1Slide the optical drive into the optical drive assembly.
2Align the tabs on the optical assembly with the slots on the computer.
3Lower the optical drive assembly into the computer.
4Lock the latch to secure the optical drive to the computer.
5Connect the data and the power cables to the optical drive.
6Install the:
a 2.5 inch hard drive assembly
22 Disassembly and reassembly
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