Do you mean the LCD on the laptop itself is cracked/bad? You might only be able to replace that through Toshiba. I've known a guy that had a similar problem on another brand. Not sure how costly it was, but wouldn't expect it to be cheap.
If she can, perhaps just get an external LCD and plug it into the back of the laptop for now. The only problem is that only works if she's working on it by the LCD. If she needs it to go mobile then she's in trouble.