What to do if iPhone screen won't work?

[Jules]

My iPhone screen is completely black. It still makes sounds when it is plugged into charged, but otherwise I can't get it to work. Will someone please help me?

[xxdenisxx23]

if you have a warranty or an apple care plan just call up apple and ask for support, or if its unlocked go to a cell phone repair place and they should be able to tell u what it is