Make sure the other end is plugged into the display.
Connect hdmi monitor to computer.
Video of the day.
The same applies to any port and cable you may have.
So for example if your monitor has a vga connection and so does your computer then use a vga cable to connect the two.
If it has hdmi then use an hdmi cable to connect the monitor to the hdmi port on the computer.
For example if you have an older pc that only has a vga video port you can use a vga to hdmi adapter cable ad to connect that computer to any monitor that has an hdmi port.
Turn on the computer and turn on the monitor.
Plug the other end of the monitor power cord shown on the right in the above picture into a power outlet.
While we re on this topic let me remind you that adapters and adapter cables exist for connecting many types of mis matched devices to one another.
The power button for the button is often found on the front or bottom of the monitor on the right side.
Most computers have the vga dvi and hdmi connection ports with some laptops coming with thunderbolt usb ports and an hdmi adapter only.
If not already done plug the flat end of the monitor power cord left cable end shown below into the back of the monitor.