Laptop doesn't work after update. What to do?

Hallihallo… I have an Acer Swift 3 laptop. Linux Ubuntu (I have no idea these words occur anywhere) I first had Ubuntu version 19.10 and then the update manager told me that an update to version 20.04 was ready. So I went to install, as always. Then in the middle of the update my laptop crashed. Then I pressed the button. And then, as always, I hit enter without changing anything. And then the Acer logo appears, as always. Then nothing happens. Absolutely nothing. I've already tried "reboot" nothing happens. Can somebody help me? Thanks in advance.

Now sounds like you have to reinstall Ubuntu because the boot loader (start area) is damaged by this PC crash or could not be restored correctly.