Woke up, opened laptop lid which came out of sleep, to find this. 
What do I do now? Repairable or replace? Laptop hasn't been mishandled or dropped. I've had it since September 2011, it's a Dell Vostro 3550. I have no idea how to replace or repair a screen myself or what it would cost to have it done. I've rebooted but it's the same. It's not the graphics card because when I do a printscreen and look at the image, the splodge isn't there.

What do I do now? Repairable or replace? Laptop hasn't been mishandled or dropped. I've had it since September 2011, it's a Dell Vostro 3550. I have no idea how to replace or repair a screen myself or what it would cost to have it done. I've rebooted but it's the same. It's not the graphics card because when I do a printscreen and look at the image, the splodge isn't there.