My screen is crash down.

Thaw Zin Mg, here is a decent teardown video. Or you can follow this:

1) Unscrew the 7 screws.

2) Disassemble the REAR CASE as shown in the image picture.

Lift the REAR CASE from below.

3)

a) Detach the 2 KEY FPCB .

b) Separate the LCD connector.

c) Lift the MIC FPCB

4) Separate the LCD connector

5) Separate the EARJACK connector and CAMERA connector from PBA.

6) Disassemble the SUS and RCV from BRACKET

7) Open the TSP connector then separate TSP from BRACKET.

8) Remove LCD from BRACKET.

Hope this helps, good luck