[Tina Edkins-slater]

has not been dropped used yesterday picked it up to use again and scrren was black but still getting all alert noises and calls

[VW Maverick]

Welcome.
Does it come on when plugged in to charge?
Are you able to pull the battery, return it and restart?

Mav.

[Tina Edkins-slater]

the phone is on just no picture on screen but you can still answercalls by swiping the screen but there is no visual on the screens
i have took the battery and sim out and re started it numerous times

[VW Maverick]

That is strange.
How long have you had your S3?

Mav.

[Tina Edkins-slater]

9 months

[Rukbat]

The warranty is 12 months, so you can have the phone replaced. (It's going to be with a refurb, but you're not giving them a new phone, so you shouldn't expect to get a new one.)

If you look at the screen in a dark room and shine a flashlight on it at the right angle, you should see some sort of shadowy images - I suspect that the LED layer went bad. That's the light behind the LCD screen that produces the images you see, and it provides the light that the screen selectively blocks. (That's how LCD screens work.)