Xiaomi Mi 3 Motherboard Replacement

Geschrieben von: Tyler Howard

Kommentare: 18

Schwierigkeitsgrad

Moderate

Schritte

Zeitaufwand

20 Minuten

Einleitung

Use this guide to replace a faulty motherboard in your Xiaomi Mi 3 smartphone.

The motherboard is a piece of hardware that allows for components of a phone – such as RAM, CPU, memory, and other components – to communicate with each other. A faulty motherboard will make your phone unable to boot up or cause it to frequently crash. It can be damaged by an overheating battery, dropping the phone, or using incompatible chargers.

Be aware that an improperly installed battery can lead to overheating and swelling of the battery, which can further damage the motherboard and potentially cause a fire.

Before beginning, make sure to power off your phone completely and disconnect from any external power source.

Werkzeuge

Schritt 1

Firmly press the SIM card removal tool into the hole located at the top of the phone to eject the SIM card tray from the slot.

Schritt 2

Remove the two Phillips head screws located at the top of the phone on either side where the SIM card was ejected.
One screw is located under an orange sticker which would serve as your warranty for the camera were this practice not illegal as per the Magnuson–Moss Warranty Act of 1975.

Schritt 3

Insert a pry tool into the upper edge of the phone, where there is a small gap between screen and frame of the phone to begin separating the screen from the rest of the phone.
Be careful when using the pry tool as it can damage the phone's screen or other components.

Schritt 4

Once the pry tool has been inserted into the phone, slide it around the perimeter of the phone while gently lifting until the screen panel and back panel of the phone separate.
Be careful when using the pry tool as it can damage the phone's screen or other components.

Schritt 5

The back of the phone should now be separated from the screen.

Schritt 6

Place the front panel screen side down with the camera at the top.
Remove these six Phillips head screws located at the upper half of the phone.
This screw is located under an orange sticker at the top right corner of the panel. The sticker can be removed with a pair of tweezers, then remove that Phillips head screw.

You miss circle mark that bolt top left you are loosening. total 8 bolt.

ary - 03/02/16

Schritt 7

Next, remove these three screws located at the bottom of the back panel.

Why do you need to remove lower cover ?

Marcel Robert - 27/12/15

Schritt 8

Using tweezers, remove the rubber dust cover on the back panel of the phone.

Why do you need to remove that ?

Marcel Robert - 27/12/15

This step is 100% unnecessary.

Tengku Elzafir Habsjah - 29/08/18

Schritt 9

Remove the plastic cover on the bottom of the back panel by inserting the pry tool at the edge and gently lifting.

Really needed ?

Marcel Robert - 27/12/15

This step and step 9 are totally not needed

leehanb - 28/06/18

Schritt 10

Remove the upper plastic cover from the back panel by inserting the pry tool into the upper edge and gently lifting.
Some models have the NFC antenna at the back of the battery glued to the top cover. It is not possible to remove the top cover without removing the battery as well. For these models, check the touchscreen guide for instructions.

Schritt 11

Using a spudger, remove the small ribbon cable that is connected to the battery.

Thank you, i changed the battery mi3 easily. I dont need steep 9,10,11. I removed nfc stickers that stick to battery and attached to top cover carefully, make it top cover and antenna nfc still integrated. Mi3 Battery is removed Due problem "Bootloop mi logo without android, and you can enter fastboot only, no matter it sucessfully flashed via fastboot room it will stay bootloop". So, yes, if the battery not good, it will goes to bootloop automatically.

ary - 03/02/16

I have the same problem. I think my battery also dead! Good information!

Rukmal Ranaweera - 17/05/16

Schritt 12

Remove the battery by gripping and pull up on the "Battery Removal" tab attached to the left side of the battery on the back panel.
Some force may be required to remove the battery since it is adhered to the phone with two pieces of double sided tape.

Use of an old credit card to help lift the battery Is much easier.

Marcel Robert - 27/12/15

I use iSesamo from the edge same as battery removal sticker. its safe from here, where other edge is have flexible cable near.

ary - 03/02/16

Schritt 13

The battery is now removed from the panel.

Schritt 14

Disconnect the antenna wire that is attached to the lower left side of the motherboard using the pry tool.

Schritt 15

Use a pry tool to separate the LCD display cable from the motherboard. The cable connects to the motherboard as a rectangular metallic piece at the bottom right of the motherboard.

Schritt 16

Disconnect the gold ribbon cable for the LCD display by gently inserting the pry tool under the wide end and lifting up.

Schritt 17

Separate a cable ribbon from the top right of the motherboard by gently inserting the pry tool under the rectangular metallic piece and lifting.

Schritt 18

Separate a cable ribbon from the top right of the motherboard - near the cable from the previous step - by gently inserting the pry tool under the rectangular metallic piece and lifting.