Screw wear<br>Deformation of key plate shrapnel<br>Mainboard pin deformation<br>LCD damage<br>Locking problem of the whole machine<br>Sn internal and external inconsistency<br>Function test problems of the whole machine
Screw wear Elastic sheet deformation of key plate Main board needle alignment deformation Liquid crystal breakage Whole machine locking problem SN internal and external inconsistency Whole machine function test problem