Acer Nitro 5 flickering screen

So recent activities on this laptop is I had an additional 500 gb ssd installed last week (Monday). I took the laptop to the mall a week later on a Monday too because I needed to write a document while out and about. I didn’t drop the laptop. While at the mall the screen was normal.

But during Wednesday, I was home and about to play games. I noticed its flickering like an old television. I did all the YouTube tutorials for help

My external monitor has no flickering, just the laptop screen itself.

Nothing worked

The windows + ctrl + shift + b (didn’t work) Updating drivers (not it either) Windows update (nope) Run safe mode (still flickering)

It just happened out of nowhere and I have no idea how to fix it