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Dell Latitude 5591 PC Build
Modixia and one other contributor
Last updated on Sep 2, 2026
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Community-Contributed Guide
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Introduction
Go to step 1 ↓This guide explains how to assemble a Restart PC using a Dell Latitude 5591 motherboard: wiring the power button and LED, adding a USB expansion card and a SATA expansion card, and then securing the assembly into the housing.
What you need
Parts
Tools
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Change the BIOS battery and secure it using double-sided tape.
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Add a RAM stick.
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Add a Wi-Fi card.
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Boot the board with the Windows drive already installed (it has a sticky note).
Ask FixBot
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Remove the black sheath.
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Connect the port to the motherboard.
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Remove the black plastics from both sides of the button board.
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Remove the rubber that is around the button and the LED.
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Remove the yellow adhesive from the rubber.
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Cut the twisted wires.
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35cm for the LED.
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42cm for the button.
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Strip and tin the 4 wire ends.
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Solder the black and white wires for the button and front LED (see photo).
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Test the button solder joints using the multimeter in "continuity tester" mode.
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Connect the alligator clips to the black and white wires.
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Press the original button. If the multimeter beeps, it's good, and you can move on to the next step.
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Plug in the PC and try to start it to test the LED polarity; the LED positive (the longer leg) goes to the white wire.
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Add the heat shrink tubing.
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Solder the LED.
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Heat the heat shrink tubing with the heat gun.
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Use a hot glue gun to apply glue over the solder joints to reinforce them.
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Perform a final check to ensure everything is working properly.
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Drive the 2 short M3 Torx screws.
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Drive the 3 M2 Phillips screws.
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Deburr the holes for the USB extension using a Phillips screwdriver.
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Insert the USB-A extension into its slot, with the long cable from the blue box in the bottom beige shelf.
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Use 2 Phillips m3 screws to secure the USB extension.
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Drive 4 short M3x6 Torx screws WITHOUT TIGHTENING.
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Flip the assembly over.
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Remove one screw.
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Insert a drop of threadlocker.
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Reinstall the screw, still WITHOUT TIGHTENING.
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Repeat the green dots for the 4 M3 screws.
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Tighten the 4 screws one by one.
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Route the extension under the motherboard.
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Connect the extension to the original connector.
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Hide the connector under the motherboard.
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Route the USB cables under the motherboard.
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Connect the various cables to the corresponding ports using the adapters.
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90° horizontal adapter.
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USB-C 90° horizontal adapter.
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USB-A 3.0 180° adapter.
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Add a drop of threadlocker.
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Screw in one short M3 Torx screw per block WITHOUT TIGHTENING.
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Once all blocks are installed, tighten the screws one by one.
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1x hub block.
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1x USB-C power block.
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1x DELL air vent block.
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1x HDMI block.
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1x RJ45 block.
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Connect the magnetic-to-USB-C adapter.
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Then, connect the USB-C expansion card.
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Add a cable tie to the HDMI cables.
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Cut off the excess with flush cutters.
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Hide the "knot" under the cable.
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Connect the SSD.
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Secure the three 3x6 mm Phillips screws.
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In our batch of PCs, we didn't have any speakers, which is why they are missing from the photos.
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Secure the speakers using screws. No idea which ones... good luck ;).
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Connect the speakers and hide the cable (see photo).
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Add a drop of threadlocker.
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Secure the air duct with 2 M2 Phillips screws.
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Repeat the green points for the dust cover.
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Glue the antennas in place using a glue gun.
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Connect the antennas.
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Tuck the cables under the motherboard.
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Cut a grounding block.
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Stick the block down.
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Install the upper plate.
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Secure with 4 black M3 Phillips FHC screws (skip this step if parts are missing).
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