Dell Inspiron 17 7786 2 In 1 Power Button W Fingerprint Reader Replacement Repair Guide

Difficulty

Moderate

Steps

Time Required

                          10 minutes

Sections

Base Cover
4 steps
Wireless Card (NIC)
1 step
Fan
4 steps
Heatsink
2 steps
Display Assembly
6 steps
I/O Board (SD and x2 USB ports)
1 step
Power Button w/ Fingerprint Reader
1 step

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Introduction

What you need

Step 1

              Base Cover

Remove the eight M2 5mm screws that secure the base cover using a Phillips #0 screwdriver.

Remove the eight M2 5mm screws that secure the base cover using a Phillips #0 screwdriver.

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Step 2

Loosen the three captive screws that secure the base closer to the hinges.
Do not attempt to remove the three captive screws! You need only to loosen them. They’re supposed to stay on the base cover.

Loosen the three captive screws that secure the base closer to the hinges.

Do not attempt to remove the three captive screws! You need only to loosen them. They’re supposed to stay on the base cover.

Step 3

Carefully pry the base cover using an iFixit opening tool in the crevice near the hinges. Guide the pick along the edges and slightly lift upwards as you go along.
Do not start from the speaker end of the edges when opening, or you may cause further damage to your device!

Carefully pry the base cover using an iFixit opening tool in the crevice near the hinges. Guide the pick along the edges and slightly lift upwards as you go along.

Do not start from the speaker end of the edges when opening, or you may cause further damage to your device!

Step 4

Carefully remove the base cover from the laptop.

Carefully remove the base cover from the laptop.

Step 5

              Wireless Card (NIC)

Remove the screw holding down the small bracket for the wireless card using a Phillips #0 screwdriver.
Remove the black wired connection from the port over the black triangle.
Remove the wire with the white marking from the port above the white triangle.
Pull the Wi-Fi card out of its slot.

Remove the screw holding down the small bracket for the wireless card using a Phillips #0 screwdriver.

Remove the black wired connection from the port over the black triangle.

Remove the wire with the white marking from the port above the white triangle.

Pull the Wi-Fi card out of its slot.

Step 6

Fan

Gently remove the I/O cable.

Gently remove the I/O cable.

Step 7

Remove the fan cable from the motherboard.

Remove the fan cable from the motherboard.

Step 8

Remove two 3 mm screws that secure the fan using a Phillips #0 screwdriver.

Remove two 3 mm screws that secure the fan using a Phillips #0 screwdriver.

Step 9

There is a little piece of tape/sticker on the fan that connects it to the heat sink. Gently remove this.
Lift the fan off the palm rest assembly.

There is a little piece of tape/sticker on the fan that connects it to the heat sink. Gently remove this.

Lift the fan off the palm rest assembly.

Step 10

              Heatsink

Loosen seven 3 mm captive screws securing the heatsink to the motherboard using a Phillips #0 screwdriver.

Loosen seven 3 mm captive screws securing the heatsink to the motherboard using a Phillips #0 screwdriver.

Step 11

Lift the heatsink off the motherboard.

Lift the heatsink off the motherboard.

Step 12

              Display Assembly

Ensure that you have your device opened flat at a 180 degree angle. This will make removal easier.

Ensure that you have your device opened flat at a 180 degree angle. This will make removal easier.

Step 13

Locate the ribbon cables for the assembly on the right hand side marked “MB1” and “MB2.”
The “MB1” ribbon is locked with a copper/brass colored handle that must be lifted upwards. Then you can remove the ribbon by pulling it away from the socket.
The “MB2” ribbon is locked in its socket with a black latch. Using a non-metallic precision tool (such as tweezers) lift the latch and pull away the MB2 cable.

Locate the ribbon cables for the assembly on the right hand side marked “MB1” and “MB2.”

The “MB1” ribbon is locked with a copper/brass colored handle that must be lifted upwards. Then you can remove the ribbon by pulling it away from the socket.

The “MB2” ribbon is locked in its socket with a black latch. Using a non-metallic precision tool (such as tweezers) lift the latch and pull away the MB2 cable.

Step 14

Remove the two screws holding down the assembly on the right hand area using a Phillips #00 screwdriver.

Remove the two screws holding down the assembly on the right hand area using a Phillips #00 screwdriver.

Step 15

Remove the screw protecting the endpoints of the NIC cables and NIC chip using a Phillips #0 screwdriver.
Gently pull away the cabling from the NIC chip.
The wires can be removed without removing the heat sink, though this is not advised if you are not familiar with the layout.

Remove the screw protecting the endpoints of the NIC cables and NIC chip using a Phillips #0 screwdriver.

Gently pull away the cabling from the NIC chip.

The wires can be removed without removing the heat sink, though this is not advised if you are not familiar with the layout.

Step 16

Remove the two screws holding down the bracket of the assembly on the left hand side using a Phillips #0 screwdriver.

Remove the two screws holding down the bracket of the assembly on the left hand side using a Phillips #0 screwdriver.

Step 17

Lift the display assembly upwards away from the palm/main assembly.

Lift the display assembly upwards away from the palm/main assembly.

Step 18

              I/O Board (SD and x2 USB ports)

Lift the latch holding down the ribbon cable on the I/O board, then pull it away using the blue tab.
Lift the I/O board upwards to remove it from the assembly.

Lift the latch holding down the ribbon cable on the I/O board, then pull it away using the blue tab.

Lift the I/O board upwards to remove it from the assembly.

Step 19

              Power Button w/ Fingerprint Reader

Lift the latch holding down the ribbon cable. Remove the cable away from the port.
Remove the screw holding down the button in place using a Phillips #0 screwdriver.
Grabbing the cushioning of the button, lift it upwards from the assembly.

Lift the latch holding down the ribbon cable. Remove the cable away from the port.

Remove the screw holding down the button in place using a Phillips #0 screwdriver.

Grabbing the cushioning of the button, lift it upwards from the assembly.

To reassemble your device, follow these instructions in reverse order.

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                    Antonio Franco

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