With laptops, I find that it depends where you drop them. If you fall on them, they tend to be less broken than if they hit concrete
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Drop them on the screen, and it takes most of the impact - it needs it to break the hard plastic back screen!. I'm picturing this laptop with a gnarly crack that moves when you prod it, and ink-like stuff squeezes out. I've seen this probably 6 times in the last 3 years, and everytime they get a new laptop, while the machine works fine in other respects, the screen is goosed.
Fair enough, back up the data because you'd be daft not to, but I don't think the data is at risk in this case, it's more a matter of if he has £400 spare for a new laptop, or if finding a second hand replacement screen is actually something he could handle.
Laptop screens tend to be fiddly to remove, you have to really take your time, but if it's a matter of taking the whole lid, and switching that, then there's not a lot to be concearned about.
Van-B
Put away, those fiery biscuits!