Hi there and welcome
Are you still able to bring the menu up on the screen?
Or the screen is not functioning at all?
And is it still taking pictures?
Are you still able to take photos?
ok, then its more then just the screen controller.
Can you remove the battery and with it out, hold down the shutter button for 60 seconds then release.
Once done, wait 10 minutes, put the battery back in, turn on the camera and tell me if you still have the problem please.