lap top screen

I’ve owned an HP Notebook - 14 since October of 2018 and have never experienced any problems with it. Yesterday morning, I attempted to boot my my PC and found it stuck on a permanent black screen with the caps lock button blinking repeatedly. I turned my laptop off and waited for 10 minutes...

My laptop screen suddenly freezes and goes white and white and whiter until it's all white. If I close it and open it then the top half is white the bottom half is black but after some time it goes white. First I had other problems with the screen they changed it and this started showing up...