ViewSonic VX2739wm-1 Service Manual page 71

Keypad Board does not work
OSD is unstable or not working
Is Key Pad Board
connecting normally?
Is Button Switch
normally?
Is Key Pad Board
Normally?
ViewSonic Corporation
Y
Y
Y
Y
Check Main Board
N
Connect Key Pad Board
N
Replace Button Switch
N
Replace Key Pad Board
CONFIDENTIAL – DO NOT COPY
71
VX2739wm-1
VX2739wm-CN