Microsoft Lumia 640 LTE Motherboard Replacement

Use your thumb or fingernail on the edge/corner of the phone to pry the back cover off the phone.

Use the tweezers to pull back the sticker, revealing the screw underneath.

Use a T4 Torx driver to remove the screws in the four corners, along with the two in the middle left side (six total).

Using the T4 Torx driver, unscrew the two screws.

Use a plastic opening tool to separate the screen from the back plastic casing

Use tweezers to release the clip on the side of device, and remove the back of the phone.

Using the tweezers or a spudger, pull the gold tab up gently.

Using tweezers or a spudger, lift the white connector up gently to completely detach the screen from the phone.

Using a plastic opening tool to carefully get under the gold strip.

Use tweezers to pull up the camera.

Use tweezers to pull up on the depth sensor.

Use a plastic opening tool to pry up the ear speaker.

Unscrew the 2 remaining screws with the T-4 bit.

Use the tweezers to remove the speaker.

Use the plastic opening tool to lift up the black tab.

Use the tweezers to gently pull up on the gold tab.

Using the spudger, slowly get underneath the gold sticker and pry it up. This sticker is held down with a strong adhesive.

Use the tweezers to remove the orange insulator foam.

Using the pry tool lift up on the black tab

Using the spudger, press out the motherboard.

Gently wiggle out the motherboard.