Answer:
The Integrated video may not be working properly well or functioning well.
Step-by-step explanation:
Solution:
In this case, it is known that the computer was working fine a night before the problem.
If the video cable is connected to a wrong video port, then the computer was unable to work previous night.the integrated video cord has not seated because most times it occurs, due to the heat sink in the card. after restoring the video cable to the video card port, it works.
If the video was disabled in BIOS/UEFI, it does not show video, even after restoring the cable.