Printer killed laptop via USB

[maiyaa]

Hello,
I have a big problem. My I3 Pro B killed my 3000€ laptop.
The printer was connected via USB. There was a bang, sounded like a short circuit. The printer LCD and the laptop turned off. The laptop mainboard ist fried. The printer also no longer works.
There was nothing that could have moved anything. The printer was also in standby.
https://omegle.onl/ vshare
I need this laptop to work. In three months I have no more money for food, can't afford a replacement.
How can anything like that happen?
I don't know what to do now. Maybe others could also be affected. I don't know if I should hire a lawyer. I am legally insured.

Best regards,
maiyaa.