Troubleshooting For Acer A211H/A221Hq(1A1D1H); No Display On The Screen - Acer A221HQV Service Manual

ACER A211H/A221HQ 21
5. Troubleshooting
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5.1 Troubleshooting for Acer A211H/A221HQ(1A1D1H):

5.1.1 No display on the screen (Screen is black and colour of LED is amber):
Does OSM display when you
push "MENU key.
When a signal isn't being
inputted, it is indicated with "No
Signal Input". it is indicated with Proceed "No OSM display"
Yes No
"Out Of Range" at the time of the section.
frequency that it can't be
distinguished.
Check if the sync signal from
computer is output and if the
video cable is connected
normally.
Input the sync signal of computer,
NG
OK
or change the cable.
Proceed "checking the resolution
change IC movement" section.