My acer aspire showing nothing on screen

This problem comes when your Processor or RAM are not working properly.so in this situation you need to check your processor and then you also need to clean your RAM and then you need to reinstall it.

While you are checking your processor. you need to make sure that your heat sink is properly connected and your CPU fan is working fine. if they are working fine then you need to remove your ram from your computer and then you need to clean it and install it .

Once you will do that then you need to restart your computer. then it should working fine.