Att Cl4940 Motherboard Replacement Repair Guide

Difficulty

Difficult

Steps

Time Required

                          30 minutes

Sections

Motherboard
5 steps

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Introduction

The motherboard is the main circuit board which provides all connectivity between the hardware components of the device. A faulty motherboard can cause your device to run slow, and in some cases not work at all. Some reasons for motherboard failure include overheating, dust, power surges, and old age.

Before using this guide, make sure to check out the page on soldering and desoldering as this will be an important skill in step 5.

Be sure to unplug your device before starting as to avoid any electrical related injuries and/or damages.

What you need

Step 1

              Motherboard

Disconnect the phone line and power cord from the back cover of the device.
Disconnect the phone cable from the side of the device.

Disconnect the phone line and power cord from the back cover of the device.

Disconnect the phone cable from the side of the device.

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Step 2

Turn the device over on its front so the back cover is facing you.
Use a bit driver to remove all five 4mm X 10mm Phillips head screws from the back cover.

Turn the device over on its front so the back cover is facing you.

Use a bit driver to remove all five 4mm X 10mm Phillips head screws from the back cover.

Step 3

Using a metal spudger, start at the bottom of the device to separate the top cover from the back cover.
Work the spudger between the top and back covers of the device starting downwards, then to each side, and finally upwards.
There are brackets every few inches along the edge of the device which may be difficult to pull apart.
The top and back cover will separate and the internals will be accessible.

Using a metal spudger, start at the bottom of the device to separate the top cover from the back cover.

Work the spudger between the top and back covers of the device starting downwards, then to each side, and finally upwards.

There are brackets every few inches along the edge of the device which may be difficult to pull apart.

The top and back cover will separate and the internals will be accessible.

Step 4

Use a bit driver to remove all five 5mm X 5mm Phillips head Motherboard screws.

Use a bit driver to remove all five 5mm X 5mm Phillips head Motherboard screws.

Step 5

Lift the motherboard upwards as shown in the first image.
Use a de-soldering pump to disconnect the electric wires by de-soldering them.

Lift the motherboard upwards as shown in the first image.

Use a de-soldering pump to disconnect the electric wires by de-soldering them.

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

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Author

                                      with 4 other contributors

                    Hongkun Zhu

Member since: 09/16/2015

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Team

                       IUPUI, Team 2-2, Harley Spring 2016                        

                                                  Member of IUPUI, Team 2-2, Harley Spring 2016 



                    IUPUI-HARLEY-S16S2G2                     


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Introduction#

What you need#

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Introduction

What you need

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