HP Compaq laptop won’t open after falling down

It is 3/4 years of old laptop. Model :Hp Compaq 8510p Laptop Notebook Pc 2 GHz Core 2 Duo.

It is 3/4 years of old laptop. Model :Hp Compaq 8510p Laptop Notebook Pc 2 GHz Core 2 Duo.
I don't think it is a motherboard problem Mechele burfeind.
It's a good idea that you re-install your Windows XP OS. However, I recommend that you do not just re-install but instead do a fresh install. Not just recovery installation but fresh install. To do this, format the partition where you want to install your Windows XP.
This is included in the installation steps if you follow through the installation CD/DVD. Next, after making a clean disk after format, you will then proceed with the installation. If there are problems after this, like it stopped, then you'll have to consider the possibility of hard disk damage. Try inserting a new hard disk and see if the problem occur.