Macbook Pro M1 (2021) display not working, what can be the issue?

My display suddenly became dark and foggy. I could just see the lights moving around in the screen. I rebooted, but now I couldn't see the backlight, which changed brightness when I changed the buttons.

After closing the lid and opening a couple times, even that stopped and the display is fully black. For the past few weeks the hinge was getting tight. When the lid was open for a long time it took some force to move it.

I gave the device for diagnosis, but they said they'll check for liquid damage. If not, it'll be covered under warranty.

Any time liquid was in contact was when I used a cloth with liquid cleaner to clean the screen. I made sure to clean it dry properly, but is it possible a tiny bit entered through the plastic below the display and corroded something? I mean, what's the risk? (I sprayed on the cloth, but what's the chance anyways?)

I am too anxious to wait for the diagnosis to complete. Can you please provide some insight?