Suppose I accidentally break my laptop myself and still have a guarantee. Would it still be repaired for me?
If you deliberately destroyed it, no. Take a look at the guarantee provider to see what is covered by the guarantee.
Suppose I accidentally break my laptop myself and still have a guarantee. Would it still be repaired for me?
No.
The guarantee / warranty only applies to defects in the product by the manufacturer.
If you break something, you have to pay for the repair yourself. It was your fault and not the manufacturer's fault. So why should he pay for the repairs?
So my problem is that it suddenly frozen and then "no bootable device" was the only thing on the screen. It still doesn't work, but that shouldn't be my fault because I haven't done anything
Then it should be under warranty