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Q : No display?
Q : No signal input?
Q : Display ripple?
A : Check VGA 15 pin D-sub connector to see if AC/DC adapter is securely connected to the power switch and the display.
A : Check D-sub connector to see if it is tightly screwed to VGA card.
A : Because of the VGA sync,use OSD-Phase mode,and adjust to the most appropriate display quality. ¡@