Just to add onto what JS said.
Most definitly the LCD could be damaged by the cold weather, when I was working in Alberta stores we ran into that alot.
As for why it is not covered under warranty, the way that I like to think of it is that it's like your car. Your warranty (mnfg or otherwise) doesnt' cover a car accident. That's something that your insurance covers. It is much the same with your laptop, the mfg warranty, and product service plan don't cover the physical damage to the screen, however your daughters home insurance may.
Most definitly again to repeat what JS said, the idea of a saleperson saying coffee being spilled on the laptop would be covered under the warranty should be addressed by our customer service department.
I hope this helps to clarify things a little for you.
