Acer NA23WABAS Service Manual page 40

1A1D1H
5.1 No display of screen Screen is black color of LED is amber . .
When a signal isn't being inputted, it is
indicated with "No Signal Input". it is
indicated with "Out Of Range" at the time
of the frequency that it can't be
distinguished.
5. Troubleshooting (continued)
( ,
Does OSM display when you push
"MENU key.
Yes
Check if the sync signal from computer is
output and if the video cable is connected
normally.
OK
Proceed "checking the resolution change IC
movement" section.
)
No Proceed "No OSM display" section.
Input the sync signal of computer, or change
NG
ACER V233H
Go to cover page
the cable.
39