Laptop won t turn on after installing 20.04

I just successfully installed Ubuntu 20.04 from an USB key on my Asus ROG 552VW.

At the end of the installationm a screen appeared saying "Remove the medium and press enter to restart".

When I removed the USB key, the laptop instantly shatdown.

Since then it does not turn on at all. When i press the power button, only one white LED in front of the laptop shows a sign of life (the one supposed to say that the laptop is on according to the manual). The power button does not turn on, nothing else turns on. There is not sound or click or whatever.

I tried to remove both drives but still no reaction.

Any thoughts about where the problem might come from? can the installation have broken any booting stuff (UEFI or whatever this is)?

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