ViewSonic N4200w-1 VS10945-1M Service Manual page 37

3 Disassembly of Main Board, Power Module, AC-IN Board, Keypad Board and IR-LED Board.
3.1 Unscrew 5 screws that secure ground loop on cables.
3.2 Unscrew 2 screws to remove Keypad-set.
3.3 Disconnect all the cables on Main Board, Power Module, AC-IN Board, Keypad Board, IR Board
and Panel.
Keypad Board
ViewSonic Corporation
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Confidential - Do Not Copy N4200w-1