An odd fix for my blurry laptop moniter

Could barely make out the text and the pictures were blurry too and off color. Thankfully, I have a tablet and I google searched the problem hoping someone has a solution. The laptop is over 7 years old and I really can't afford a new one right now. Read a comment on one site where the poster said to hold on to the upper corners of the moniter and gently twist the moniter by pulling one corner while pushing the other corner and then reversing.

I did that and the screen returned to normal. Couldn't believe it!! Sadly, I didn't pay attention to what site where I had read that suggestion as I had shut down down my tablet, fed the dogs and took my blood thinner medication before attempting the procedure.