Microtek C783 User Manual page 7

The monitor is equipped with an auto-sensing power supply for voltage
ranging from 110~240VAC, 60/50Hz. Confirm the line voltage designation
on the rear panel of the monitor.
Follow these steps to install the monitor:
1. Before you connect the cables, make sure that the monitor and the
system unit power switches are OFF.
2. Plug one end of the 15pin signal cable to the monitor and the other
end to the video signal connector at the rear of the system. Tighten
the two screws on the cable connector on both ends. Otherwise, the
screen will be abnormal and the LED light will be yellow in color
(instead of the normal green).
3. Connect the power to the monitor throught the AC-DC adapter.
4. Connect the power cord on the AC outlet. See illustration below.