Nothing Displays On Screen (Screen Is Black) - Elo TouchSystems ET17 XXL Series Service Manual

2. Nothing displays on screen (Screen is black)

Is backlight lit?
OK
Does computer
output RGB video
signals?
OK
Check OSM menu is
displayed on screen
when you push the
"PROCEED" key.
OK
Proceed
"Abnormal screen "
section
Refer "Checking the backlight
NG
unit" section
Check the video cable for
failure. Check the host for
output signal with all black
only.
(1) Change pattern of video
NG
(2) Reconnect the video cable.
(3) Change the video cable.
Check if the LCD video signal
NG
cable is connected between
the MAIN PWB and LCD
module.
OK
Next Page
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signal output on the host.
Failure Point
NG
The Cable is
disconnected