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Open the back cover.
Lift and remove the battery.
Using a screwdriver (hex T6), unscrew 9 bolts in the frame of the phone.
Pry and remove the middle frame.
It is necessary to separate it carefully. Because of the inter-board cable that goes from the module to the connector on the PCB. The board locates in the middle frame.
Pry and remove the vibration motor and main camera.
Using a screwdriver (hex T6), unscrew 2 bolts securing the charging port.
Disconnect connector on the PCB and remove the flat cable with the headphone jack/socket.
Remove the PCB.
The middle frame.
The display module.
Detailed disassembly instructions of Microsoft Lumia 640 DS RM-1077 in the video, made by our mobile repair & service center:
Senior maintenance service and repair engineer
Disassembling\Repair has easy complexity and takes about 3 minutes in time. Our manual is suitable for all models Microsoft Lumia 640 DS RM-1077 — Lumia RM-1077 released for markets in different countries.