Laptop won't turn on anymore?

Hello, last night my laptop was working perfectly 🙂 This morning, I tried to charge an expensive power bank (€200, but I don't know which one) with it. I just turned on the laptop, plugged in the power bank, and immediately the laptop shut down. It hasn't turned on since. The LED doesn't even light up while charging.
The power bank is very powerful, and I've connected it for the very first time. Could this somehow be related to my laptop not working anymore? Maybe too much power or something? I know nothing about this topic… maybe someone else knows enough about it.