Dell OptiPlex 5400 All-In-One OptiPlex 5400 Service Manual
Dell OptiPlex 5400 All-In-One Manual
 |
View all Dell OptiPlex 5400 All-In-One manuals
Add to My Manuals
Save this manual to your list of manuals |
Dell OptiPlex 5400 All-In-One manual content summary:
- Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 1
OptiPlex 5400 Service Manual Regulatory Model: W26C Regulatory Type: W26C005 March 2022 Rev. A00 - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 2
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. © 2022 Dell Inc. or its subsidiaries. All rights reserved. Dell, EMC - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 3
Contents Chapter 1: 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 BitLocker...9 - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 4
Removing the system fan-35 W...37 Installing the system fan-35 W...38 Removing the system fan-65 W...39 Installing the system fan-65 W...40 Coin-cell battery...41 Removing the coin-cell battery...41 Installing the coin-cell battery...42 Wireless card...43 Removing the wireless card...43 Installing - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 5
an existing system setup password 103 Clearing CMOS settings...103 Clearing BIOS (System Setup) and System passwords 103 Chapter 5: Troubleshooting...104 Dell SupportAssist Pre-boot System Performance Check diagnostics 104 Running the SupportAssist Pre-Boot System Performance Check 104 Display - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 6
and the contacts. CAUTION: You should only perform troubleshooting and repairs as authorized or directed by the Dell technical assistance team. Damage due to servicing that is not authorized by Dell is not covered by your warranty. See the safety instructions that is shipped with the product or at - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 7
taken before performing any disassembly instructions. Observe the following safety potential. This is done through the use of a field service electrostatic discharge (ESD) kit. When connecting a bonding wire may not be obvious, such as intermittent problems or a shortened product life span. As the - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 8
errors, etc. The more difficult type of damage to recognize and troubleshoot is the intermittent (also called latent or "walking wounded") failure. , the ESD mat, and the hardware is known as bonding. Use only Field Service kits with a wrist strap, mat, and bonding wire. Never use wireless wrist - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 9
parts separate from all insulator parts while performing service and that they use anti-static bags for apart for a stable base, and point your toes out. 2. Tighten stomach muscles. Abdominal muscles support your spine when you lift, offsetting the force of the load. 3. Lift with your legs - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 10
2 Removing and installing components NOTE: The images in this document may differ from your computer depending on the configuration you ordered. Recommended tools The procedures in this document may require the following tools: ● Phillips screwdriver #0 ● Phillips screwdriver #1 ● Phillips - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 11
Table 1. Screw list (continued) Component Screw type Camera assembly M3x5 Camera door M3x5 Heat sink-35 W Heat sink-65 W Power-supply unit (PSU) Captive screws Captive screws M3x5 PSU fan M3x5 Rear-I/O bracket M3x5 System board M3x5 Speakers M3 4+7.1xZN Power-button board - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 12
Major components of OptiPlex 5400 All-in-One The following image shows the major components of OptiPlex 5400 All-in-One. 1. Stand 3. Heat sink 5. Processor 7. M.2 2230/2280 solid-state drive 9. Side-I/O board 11. Audio board 13. Display-assembly base 15. Camera-assembly door 17. System board 19. - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 13
on an elevated, clean, and flat surface. Dell Technologies recommends removing the stand to avoid accidental damage to the system display during servicing. About this task The following image provides a visual representation of the fixed stand removal procedure. Steps 1. Press and slide the release - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 14
procedure to remove the Height Adjustable Stand with Optical Disk Drive. 1. Follow the procedure in Before working inside your computer. CAUTION: When servicing the system, place it on an elevated, clean, and flat surface. Dell recommends removing the stand to avoid accidental damage to the system - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 15
Steps 1. Press and slide the release button up. 2. Hold the button in the release position, and lift the stand upward. 3. Slide the stand downward, to lift the stand off the back cover. Installing the height adjustable stand Prerequisites If you are replacing a component, remove the existing - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 16
inside your computer. Cable cover-optional Removing the cable cover Prerequisites 1. Follow the procedure in Before working inside your computer. CAUTION: When servicing the system, place it on an elevated, clean, and flat surface. It is recommended to remove the stand to avoid accidental damage to - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 17
Steps 1. Unroute the power cable from the slots on the cable cover. 2. Remove the screw (M3x5) that secures the cable cover to the bottom cover. 3. Lift the cable cover from the bottom cover. Removing and installing components 17 - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 18
Installing the cable cover Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure. About this task The following image provides a visual representation of the cable cover installation procedure: 18 Removing and installing - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 19
on an elevated, clean, and flat surface. It is recommended to remove the stand to avoid accidental damage to the system display during servicing. 2. Remove the stand. 3. Remove the cable cover (optional). About this task The following image provides a visual representation of the back cover removal - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 20
Steps 1. Press and hold the release tab on the back cover to release it from the latch on the system-board shield. 2. Slide the back cover up to release the tabs on the cover from the slots on the middle frame. 3. Lift the back cover and remove it from the system. 20 Removing and installing - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 21
Installing the back cover Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure. About this task The following image provides a visual representation of the back cover installation procedure. Removing and installing components 21 - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 22
Steps 1. Place the back cover on the middle frame and system-board shield and align the tabs on the back cover with the slots on the middle frame. 2. Slide the back cover to lock the release tab under the latch on the system-board shield. Next steps 1. Install the cable cover (optional). 22 - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 23
2. Install the stand. 3. Follow the procedure in After working inside your computer. Hard drive Removing the hard drive Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the stand. 3. Remove the cable cover (optional). 4. Remove the back cover. About this task - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 24
Steps 1. Press down the tab securing the hard-drive assembly to the system-board shield. 2. Slide and lift the hard-drive assembly from the slot on the display-assembly base. 3. Pry the tabs on hard-drive bracket from its slots on the hard drive. 4. Remove the hard drive from the hard-drive bracket. - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 25
Steps 1. Align the tabs on the hard-drive bracket with the slots on the hard drive. 2. Flex the hard-drive bracket and replace the remaining tabs on the hard-drive bracket with the slots on the hard drive. 3. Place the hard-drive assembly into the slot and slide it to lock the hard-drive assembly on - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 26
Steps 1. Pry and remove the DIMM door from the system-board shield. 2. Using your fingertips, spread apart the securing clips on the memory-module slot until the memory module pops up. 3. Slide and remove the memory module from the memory-module slot. NOTE: Repeat step 2 and 3 if there are two - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 27
Steps 1. Align the notch on the memory module with the tab on the memory-module slot. 2. Slide the memory module firmly into the slot at an angle and press the memory module down until it clicks into place. NOTE: If you do not hear the click, remove the memory module and reinstall it. NOTE: Repeat - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 28
System-board shield Removing the system-board shield Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the stand. 3. Remove the cable cover (optional). 4. Remove the back cover. About this task The following image indicates the location of the system-board - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 29
About this task The following image indicates the location of the system-board shield and provides a visual representation of the installation procedure. Steps 1. Align the screw holes on the system-board shield with the screw holes on the display-assembly base. 2. Replace the five screws (M3x5) to - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 30
5. Remove the system-board shield. About this task The following image indicates the location of the slot-1 M.2 2230 solid-state drive and provides a visual representation of the removal procedure. Steps 1. Remove the screw (M2x2.5) that secures the solid-state drive to the system board. 2. Slide - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 31
Steps 1. Align the notch on the solid-state drive with the tab on the M.2 card slot. 2. Slide the solid-state drive into the M.2 card slot on the system board. 3. Replace the screw (M2x2.5) to secure the solid-state drive to the system board. Next steps 1. Install the system-board shield. 2. Install - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 32
Steps 1. Remove the screw (M2x2.5) that secures the solid-state drive to the system board. 2. Slide and remove the solid-state drive from the M.2 card slot on the system board. Installing the M.2 2280 solid-state drive-slot 1 Prerequisites CAUTION: Solid-state drives are fragile. Exercise care when - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 33
Steps 1. Align the notch on the solid-state drive with the tab on the M.2 card slot. 2. Slide the solid-state drive into the M.2 card slot on the system board. 3. Replace the screw (M2x2.5) to secure the solid-state drive to the system board. Next steps 1. Install the system-board shield. 2. Install - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 34
Steps 1. Remove the screw (M2x2.5) that secures the solid-state drive to the system board. 2. Slide and remove the solid-state drive from the M.2 card slot on the system board. Installing the M.2 2230 solid-state drive-slot 2 Prerequisites CAUTION: Solid-state drives are fragile. Exercise care when - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 35
Steps 1. Align the notch on the solid-state drive with the tab on the M.2 card slot. 2. Slide the solid-state drive into the M.2 card slot on the system board. 3. Replace the screw (M2x2.5) to secure the solid-state drive to the system board. Next steps 1. Install the system-board shield. 2. Install - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 36
Steps 1. Remove the screw (M2x2.5) that secures the solid-state drive to the system board. 2. Slide and remove the solid-state drive from the M.2 card slot on the system board. Installing the M.2 2280 solid-state drive-slot 2 Prerequisites CAUTION: Solid-state drives are fragile. Exercise care when - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 37
Steps 1. Align the notch on the solid-state drive with the tab on the M.2 card slot. 2. Slide the solid-state drive into the M.2 card slot on the system board. 3. Replace the screw (M2x2.5) to secure the solid-state drive to the system board. Next steps 1. Install the system-board shield. 2. Install - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 38
Steps 1. Disconnect the system-fan cable from the system board. 2. Remove the three screws (M3x5) that secure the system fan to the display-assembly base. 3. Lift the system fan, along with its cable, off the display-assembly base. Installing the system fan-35 W Prerequisites If you are replacing a - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 39
Steps 1. Align the screw holes on the system fan with the screw holes on the display-assembly base. 2. Replace the three screws (M3x5) to secure the system fan to the display-assembly base. 3. Connect the system-fan cable to the connector on the system board. Next steps 1. Install the system-board - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 40
Steps 1. Disconnect the system-fan cable from the system board. 2. Remove the three screws (M3x5) that secure the system fan to the display-assembly base. 3. Lift the system fan, along with its cable, off the display-assembly base. Installing the system fan-65 W Prerequisites If you are replacing a - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 41
Steps 1. Align the screw holes on the system fan with the screw holes on the display-assembly base. 2. Replace the three screws (M3x5) to secure the system fan to the display-assembly base. 3. Connect the system-fan cable to the connector on the system board. Next steps 1. Install the system-board - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 42
Steps 1. Using the plastic scribe, press on the metal clip to release the coin-cell battery from the coin-cell battery holder. 2. Lift the coin-cell battery from the coin-cell battery holder. Installing the coin-cell battery Prerequisites If you are replacing a component, remove the existing - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 43
Steps With the positive-side facing up, insert the coin-cell battery into the battery holder on the system board and gently press the battery until it snaps into place. Next steps 1. Install the system-board shield. 2. Install the back cover. 3. Install the cable cover (optional). 4. Install the - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 44
Steps 1. Remove the two screws (M2x2.5) that secure the wireless-card shield to the system board. 2. Unroute the antenna cables from the routing guides on the wireless-card shield. 3. Lift the wireless-card shield out of the system. 4. Remove the screw (M2x2.5) that secures the wireless-card bracket - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 45
card. 7. Replace the two screws (M2x2.5) to secure the wireless-card shield to the system board. 8. Route the antenna cables through the routing guides on the wireless-card shield. Next steps 1. Install the system-board shield. 2. Install the back cover. Removing and installing components 45 - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 46
3. Install the cable cover (optional). 4. Install the stand. 5. Follow the procedure in After working inside your computer. Camera assembly Removing the camera assembly Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the stand. 3. Remove the cable cover ( - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 47
to the middle frame. 4. Slide and remove the camera assembly from the middle frame. 5. Unroute the camera cable from the routing guides on the display-assembly base. Installing the camera assembly Prerequisites If you are replacing a component, remove the existing component before performing the - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 48
2. Slide the camera assembly on the middle frame, and align the screw holes on the camera assembly with the screw holes on the middle frame. 3. Replace the two screws (M3x5) to secure the camera assembly to the middle frame. 4. Connect the camera cable to the system board. 5. Align the screw holes - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 49
Steps 1. Remove the four screws (M3x5) that secure the bottom cover to the display-assembly base. 2. Pry and lift the bottom cover off the display-assembly base. Installing the bottom cover Prerequisites If you are replacing a component, remove the existing component before performing the - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 50
Steps 1. Align the screw holes on the bottom cover with the screw holes on the display-assembly base. 2. Replace the four screws (M3x5) to secure the bottom cover to the display-assembly base. Next steps 1. Install the system-board shield. 2. Install the back cover. 3. Install the cable cover ( - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 51
Removing and installing components 51 - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 52
-supply socket to the rear-I/O bracket. 2. Slide the power-supply socket out of the rear-I/O bracket. 3. Remove the power-supply cable from the routing guides on the rear-I/O bracket and PSU fan. 4. Disconnect the power-supply cable from the connector on the system board. 5. Remove the screw (M3x5 - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 53
Removing and installing components 53 - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 54
to the display-assembly base. 3. Connect the power-supply cable to the connector on the system board. 4. Route the power-supply cable through the routing guides on the rear-I/O bracket and PSU fan. 5. Align the screw hole on the power-supply socket with the screw hole on the rear-I/O bracket, and - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 55
Steps 1. Remove the power-supply cable from the routing guides on the PSU fan. 2. Disconnect the PSU-fan cable from the system board. 3. Remove the two screws (M3x5) that secure the PSU fan to the - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 56
display-assembly base. 3. Connect the PSU-fan cable to the connector on the system board. 4. Route the power-supply cable through the routing guides on the PSU fan. Next steps 1. Install the system-board shield. 2. Install the back cover. 3. Install the cable cover (optional). 4. Install the stand - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 57
Steps 1. In reverse sequential order (as indicated on the heat sink), loosen the five captive screws that secure the heat sink to the system board and the display-assembly base. 2. Slide and lift the heat sink off the system board and display-assembly base. Installing the heat sink-35 W - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 58
Steps 1. Align the screw holes on the heat sink with the screw holes on the system board and the display-assembly base. 2. In sequential order (as indicated on the heat sink), tighten the five captive screws that secure the heat sink to the system board and display-assembly base. Next steps 1. - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 59
Steps 1. In reverse sequential order (as indicated on the heat sink), loosen the five captive screws that secure the heat sink to the system board and the display-assembly base. 2. Slide and lift the heat sink off the system board and display-assembly base. Installing the heat sink-65 W - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 60
Steps 1. Align the screw holes on the heat sink with the screw holes on the system board and the display-assembly base. 2. In sequential order (as indicated on the heat sink), tighten the five captive screws that secure the heat sink to the system board and display-assembly base. Next steps 1. - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 61
About this task The following image indicates the location of the processor and provides a visual representation of the removal procedure. Steps 1. Press the release lever down and then push it away from the processor to release it from the securing tab. 2. Extend the release lever completely, and - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 62
Steps 1. Ensure that the release lever on the processor socket is fully extended in the open position. NOTE: The pin-1 corner of the processor has a triangle that aligns with the triangle on the pin-1 corner on the processor socket. When the processor is properly seated, all four corners are aligned - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 63
. Steps 1. Remove the screw (M3x5) that secures the power-supply socket to the rear-I/O bracket. 2. Remove the power-supply cable from the routing guide on the rear-I/O bracket. 3. Slide and remove the power-supply socket away from the rear-I/O bracket. 4. Remove the three screws (M3x5) that secure - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 64
base. 2. Replace the three screws (M3x5) to secure the rear-I/O bracket to the display-assembly base. 3. Route the power-supply cables through the routing guide on the rear-I/O bracket. 4. Align the screw hole on the power-supply socket with the screw hole on the rear-I/O bracket, and place it in - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 65
board Removing the system board Prerequisites 1. Follow the procedure in Before working inside your computer. NOTE: Your computer's Service Tag is stored in the system board. You must enter the Service Tag in the BIOS setup program after you replace the system board. NOTE: Replacing the system board - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 66
1. Power-supply unit (PSU) cable connector 2. Coin-cell battery 3. Display back-light cable connector 4. Camera cable connector 5. M.2 2230/2280 solid-state drive connector 6. Processor-fan cable connector 7. Memory modules 8. Hard-drive connector 9. M.2 2230/2280 solid-state drive connector 10. - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 67
Steps 1. Disconnect the display back-light cable from the connector on the system board. 2. Disconnect the display cable from the connector on the system board. 3. Disconnect the PSU cable from the connector on the system board. 4. Disconnect the PSU fan cable from the connector on the system board. - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 68
1. Power-supply unit (PSU) cable connector 2. Coin-cell battery 3. Display back-light cable connector 4. Camera cable connector 5. M.2 2230/2280 solid-state drive connector 6. Processor-fan cable connector 7. Memory modules 8. Hard-drive connector 9. M.2 2230/2280 solid-state drive connector 10. - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 69
Steps 1. Align the screw holes on the system board with the screw holes on the display-assembly base. 2. Replace the nine screws (M3x5) to secure the system board to the display-assembly base. Removing and installing components 69 - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 70
optional). 13. Install the stand. 14. Follow the procedure in After working inside your computer. NOTE: Your computer's Service Tag is stored in the system board. You must enter the Service Tag in the BIOS setup program after you replace the system board. NOTE: Replacing the system board removes any - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 71
board. 2. Remove the six screws (M3 4+7.1xZN) that secure the speakers to the display-assembly base. 3. Remove the speaker cable from the routing guides on the display-assembly base. 4. Lift the speakers along with the cable off the display-assembly base. Installing the speakers Prerequisites If you - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 72
base. 2. Replace the six screws (M3 4+7.1xZN) to secure the speakers to the display-assembly base. 3. Route the speaker cable through the routing guide on display-assembly base and connect the speaker cable to the system board. Next steps 1. Install the rear-I/O bracket. 2. Install the bottom cover - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 73
5. Remove the system-board shield. 6. Remove the bottom cover. 7. Remove the rear-I/O bracket. 8. Remove the speakers. About this task The following image indicates the location of the power-button board and provides a visual representation of the power-button board removal procedure. Steps 1. Open - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 74
Steps 1. Align and place the power-button board in the slot on the middle frame. 2. Replace the screw (M3x5) to secure the power-button board to the middle frame. 3. Slide the power-button cable into the connector on the system board and close the latch to secure the cable. Next steps 1. Install the - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 75
and provides a visual representation of the removal procedure. Steps 1. Disconnect the microphone cable from the system board, and unroute it from the routing guides on the display-assembly base. 2. Remove the two screws (M2x2.5) that secure the microphone modules to the middle frame. 3. Lift the - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 76
on the middle frame. 2. Replace the two screws (M2X2.5) to secure the microphone modules to the middle frame. 3. Route the microphone cable through the routing guides on the display-assembly base and connect the microphone cable to the system board. 76 Removing and installing components - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 77
Next steps 1. Install the speakers. 2. Install the rear-I/O bracket. 3. Install the bottom cover. 4. Install the system-board shield. 5. Install the back cover. 6. Install the cable cover (optional). 7. Install the stand. 8. Follow the procedure in After working inside your computer. Side I/O-board - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 78
-power cable, and audio-board cable from the system board. 4. Remove the SIO-signal cable, SIO-power cable, and audio-board cable from the routing guides on the display-assembly base. 5. Remove the two screws (M2.5x3.5) that secure the side I/O-board to the display-assembly base. 6. Lift and remove - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 79
.5) to secure the side I/O-board to the display-assembly base. 3. Route the SIO-signal cable, SIO-power cable, and audio-board cable through the routing guides on the display-assembly base. 4. Connect the SIO-signal cable, SIO-power cable, and audio-board cable to the connectors on the system board - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 80
Audio board Removing the audio board Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the stand. 3. Remove the cable cover (optional). 4. Remove the back cover. 5. Remove the system-board shield. 6. Remove the bottom cover. 7. Remove the rear-I/O bracket. 8. - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 81
Steps 1. Align the screw hole on the audio board with the screw hole on the display-assembly base. 2. Replace the screw (M3x5) to secure the audio board to the display-assembly base. 3. Connect the audio-board cable to the system board. Next steps 1. Install the side-I/O board. 2. Install the rear - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 82
Steps 1. Remove the antenna cables from the routing guides on the display-assembly base. 2. Remove the two screws (M2x2.5) that secure the antenna modules to the middle frame. 3. Carefully peel the copper foil that - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 83
frame. 3. Replace the two screws (M2x2.5) to secure the antenna modules to the middle frame. 4. Route the antenna cables through the routing guides on the display-assembly base. Next steps 1. Install the speakers. 2. Install the rear-I/O bracket. 3. Install the bottom cover. 4. Install the wireless - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 84
9. Remove the speakers. 10. Remove the camera assembly. 11. Remove the system board. 12. Remove the PSU fan. 13. Remove the PSU. About this task The following image indicates the location of the display panel and provides a visual representation of the display panel removal procedure. 84 Removing - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 85
non-touch display) that secure the display panel to the middle frame and display-assembly base. 2. Unroute the display back-light cable from the routing guides on the display-assembly base. 3. Place the system in an upright position. 4. Holding the top corner, release the display panel away from the - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 86
Steps 1. Place the system in an upright position, and slide the display panel on the slots of the display-assembly base. 2. Route the display-backlight, and display cable through the slots on the display-assembly base. 3. Place the display-assembly base on a clean and flat surface with the display - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 87
display panel. It is used to align the display panel to the displayassembly base. 6. Route the display back-light cable in the routing guides on the display-assembly base. Next steps 1. Install the PSU. 2. Install the PSU fan. 3. Install the system board. 4. Install the camera assembly. 5. Install - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 88
Steps 1. Remove the 17 screws (M3x5) that secure the middle frame to the display-assembly base. 2. Remove the middle frame and lift the middle frame off the display-assembly base. Installing the middle frame Prerequisites If you are replacing a component, remove the existing component before - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 89
Steps 1. Slide and align the middle frame to the slots on the display-assembly base, then snap the middle frame into place on the display-assembly base. 2. Replace the 17 screws (M3x5) to secure the middle frame to the display-assembly base. Next steps 1. Install the display panel. 2. Install the - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 90
3 Drivers and downloads When troubleshooting, downloading or installing drivers it is recommended that you read the Dell Knowledge Based article, Drivers and Downloads FAQ 000123347. 90 Drivers and downloads - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 91
4 BIOS setup CAUTION: Unless you are an expert computer user, do not change the settings in the BIOS Setup program. Certain changes can make your computer work incorrectly. NOTE: Depending on the computer and its installed devices, the items listed in this section may or may not be displayed. NOTE - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 92
Table 4. System setup options-System information menu Overview OptiPlex 5400 All-in-One BIOS Version Displays the BIOS version number. Service Tag Displays the Service Tag of the computer. Asset Tag Displays the Asset Tag of the computer. Manufacture Date Displays the manufacture date of - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 93
Table 4. System setup options-System information menu (continued) Overview DIMM_SLOT 1 Displays the DIMM 1 memory size. DIMM_SLOT 2 Displays the DIMM 2 memory size. Devices Information Panel Type Displays the Panel Type of the computer. Video Controller Displays the video controller type - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 94
Table 6. System setup options-Integrated Devices menu (continued) Integrated Devices Audio Enable Audio Enable or disable the integrated audio controller. By default, all the options are enabled. USB Configuration ● Enable or disable booting from USB mass storage devices through the boot - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 95
Mode With Auto Mode, the HTTPs Boot extracts Boot URL from the DHCP. With Manual Mode, the HTTPs Boot reads Boot URL from the user-provided data. By default, the Enable USB PowerShare option is disabled USB Wake Support Enable USB Wake Support When enabled, you can use the USB devices like a - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 96
Intel Speed Shift Technology Enable or disable the Intel speed shift technology support. By default, the Intel Speed Shift Technology option is enabled. disable the BIOS module interface of the optional Absolute Persistence Module service from Absolute software. By default, the option is enabled. - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 97
BIOS setup. By default, the option is disabled. Master Password Lockout Enable Master Password Lockout When enabled, this will disable the master password support. By default, the option is disabled. Allow Non-Admin PSID Revert Enable Allow Non-Admin PSID Revert Controls access to the Physical - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 98
. By default, the option is enabled. BIOSConnect Enable or disable cloud Service OS recovery if the main operating system fails to boot with the number the value specified by the Auto OS Recovery Threshold setup option and local Service OS does not boot or is not installed. By default, the option - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 99
provided by Intel Trusted Execution Technology. By default, the option is disabled. Table 18. System setup options-Performance menu Performance Multi Core Support Active Cores Enables to change the number of CPU cores available to the operating system. By default, the All Cores options is - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 100
.dell.com/support. 2. Click Product support. In the Search support box, enter the Service Tag of your computer, and then click Search. NOTE: If you do not have the Service Tag, use the SupportAssist feature to automatically identify your computer. You can also use the product ID or manually browse - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 101
press Enter. The BIOS Update Utility appears. 8. Follow the on-screen instructions to complete the BIOS update. Updating the BIOS from the F12 One-Time option for your computer. If the option is listed, then the BIOS supports this BIOS update option. NOTE: Only computers with BIOS Flash Update option - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 102
Steps 1. From a turn off state, insert the USB drive where you copied the flash into a USB port of the computer. 2. Turn on the computer and press F12 to access the One-Time Boot Menu, select BIOS Update using the mouse or arrow keys then press Enter. The flash BIOS menu is displayed. 3. Click Flash - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 103
Turn on your computer. Clearing BIOS (System Setup) and System passwords About this task To clear the system or BIOS passwords, contact Dell technical support as described at www.dell.com/contactdell. NOTE: For information on how to reset Windows or application passwords, refer to the documentation - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 104
Troubleshooting messages that inform you of problems encountered during testing NOTE: Some information, see https://www.dell.com/support/kbdoc/000180971. Running the SupportAssist Pre-Boot test About this task The following procedure provides the instructions on how to run the built-in self test - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 105
CPU failure ● Run the Dell Support Assist/Dell Diagnostics tool. ● If problem persists, replace the system board problem persists, replace the memory module. 2 6 System board/Chipset Error Replace the system board. 2 7 LCD failure (SBIOS message) Replace the LCD module. Troubleshooting - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 106
holding down power button 3~5 seconds to ensure all power are drained. ● Run "BIOS recovery from USB", and the instructions are in the website Dell support. ● If problem persists, replace the system board. Timeout waiting on ME to reply to HECI message. Replace the system board. Recovering - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 107
It is recommended to create a recovery drive to troubleshoot and fix problems that may occur with Windows. Dell proposes multiple options The following procedure provides the instructions on how to conduct a WiFi power cycle: NOTE: Some ISPs (Internet Service Providers) provide a modem/router - Dell OptiPlex 5400 All-In-One | OptiPlex 5400 Service Manual - Page 108
about your computer through videos, manuals and documents. Your Dell computer is uniquely identified by a Service Tag or Express Service Code. To view relevant support resources for your Dell computer, enter the Service Tag or Express Service Code at www.dell.com/support. For more information on
-
1 -
2 -
3 -
4 -
5 -
6 -
7 -
8
-
9
-
10
-
11
-
12
-
13
-
14
-
15
-
16
-
17
-
18
-
19
-
20
-
21
-
22
-
23
-
24
-
25
-
26
-
27
-
28
-
29
-
30
-
31
-
32
-
33
-
34
-
35
-
36
-
37
-
38
-
39
-
40
-
41
-
42
-
43
-
44
-
45
-
46
-
47
-
48
-
49
-
50
-
51
-
52
-
53
-
54
-
55
-
56
-
57
-
58
-
59
-
60
-
61
-
62
-
63
-
64
-
65
-
66
-
67
-
68
-
69
-
70
-
71
-
72
-
73
-
74
-
75
-
76
-
77
-
78
-
79
-
80
-
81
-
82
-
83
-
84
-
85
-
86
-
87
-
88
-
89
-
90
-
91
-
92
-
93
-
94
-
95
-
96
-
97
-
98
-
99
-
100
-
101
-
102
-
103
-
104
-
105
-
106
-
107
-
108
 |
 |
OptiPlex 5400
Service Manual
Regulatory Model: W26C
Regulatory Type: W26C005
March 2022
Rev. A00