What if my laptop only shows blue and the keyboard lights up but nothing comes?

What if my laptop only shows blue and the keyboard lights up but nothing comes?

Then something is wrong.

Your PC may not boot into something you have changed in the BIOS?

Then your laptop only shows blue, the keyboard lights up but nothing comes.
Or, as my prescriber already wrote:

Then something is wrong.

First try to dust off the ventilation slots with a vacuum cleaner, secondly try to restart if nothing comes up, find a windows repair tool or an iso boot stick with win and boot it up, see if what happens, if nothing happens, the screen is probably broken.