Monitor does not read the pc

This monitor had an issue that would ask to press any key from the keyboard as for the monitor was not receiving signal from the pc. 

Issues:

• I pressed the keyboard keys and mouse buttons and did not displayed
• HDMI was connect and did not receive signal from the pc.
• The pc did show that is was turn on but the monitor did not display anything

Click here to view the video how I solved this problem :)

Link for the video