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Introduction

Use this guide to learn how to disassemble your HP Deskjet 6840 printer. You may need to take your printer apart if you're troubleshooting a problem or removing a paper jam.

What you need

Step 1 General Device

HP Deskjet 6840 General Device Disassembly, General Device: step 1, image 1 of 1

Start by turning the printer around so you can work on the backside of the printer.

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Step 2

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Use both hands to press the two grooves on the back of the printer. Simultaneously press both grooves down and in.
This will release the back panel from the printer.
Remove the back panel from the printer.

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Step 3

HP Deskjet 6840 General Device Disassembly: step 3, image 3 of 3

Use a screwdriver to remove each visible screw.
Using two hands, pull out and remove the rear support structure.

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Step 4

Carefully remove the large, black shell that encases the internal body of your printer.
Gently remove the shell from the base of the printer by placing your hands at the corners and firmly lifting the shell until it pops off of the base. Do not pry or bend the shell.
Carefully detach wires that connect the shell to the printer's internal parts.

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Step 5

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Use a screwdriver to remove the screws from the printer carriage assembly and the green plastic motherboard.
Gently loosen the motherboard from its base, but do not fully remove it.

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Step 6

HP Deskjet 6840 General Device Disassembly: step 6, image 3 of 3

Use a screwdriver to remove the screws securing the motor carriage.
If you need to replace the motor, remove the screws from the motor housing.
Carefully lift the motor out of the housing with your fingers and replace it with a new one.