BenQ VM2221 Product Service Manual page 68

c. loose screw of HDMI connected location
a. take off the iron brace of on/off
13. take off main board and power board
Tool: pneumatic driver, cotton gloves, static electricity ring
A. loose the screw of main board and power board as below picture
Screw
Screw1
Screw
Screw1
d.loose the screw of VGA cabel
Screw
Screw
Screw
b. loose screw of IO board
Screw
Screw
68
E. loose tuner nut