Acer P221W - Trouble Shooting Guide

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6.2. Trouble Shooting Guide
6.2.1 No Display or display is unstable
1. Interface Board
No
OSD shown when key
pressed?
Follow instructions from OSD
dialog
Keypad OK?
Yes
No
Screen is Blank and
Power LED is
blue.
Backlight turned
ON?
Scalar outpu
t
Data ?
Yes
Proceed to
“Check Power Board”.
No
Yes
“Check LCD
Module”
No
Proceed to
“Check Scalar”
Proceed to
“Check Control Board”.
Yes