Why don't some of the keys on the keyboard work?

Question

Iron

Good day to all! On a DNS laptop, some of the keys do not work after turning on. And after 5 minutes everything is fine.
Those. in the 3rd row through one key: YARLD. What could be the reason?
There was a software problem. Cleaned the laptop and normal.

Answer 1

Hardware problems. Somewhere there is a bad contact - either in the keyboard itself (then it needs to be replaced), or in the place where the keyboard cable is connected to the board.