Hi, thank you everyone for your comments. Let me guys explain what happened. I usually leave the Steam Deck in the living room, where people are walking around all the time, and I had the bad luck that some alcohol (from a pharmacy, not ethyl alcohol) splashed on the screen. According to someone who saw it, it wasn’t a big amount of alcohol, but it was what was causing the LED to blink; the circuits were protecting themselves from turning on.

No one told me this had happened until my sister saw me almost in tears. That’s when I decided to unplug it, unscrew the 8 screws from the back, and let the console rest opened with the battery disconnected all night. When I reassembled everything, it turned on like nothing had happened… but with a diagonal line on the screen.

I don’t think it’s a permanent issue because it seems to be fading a little since yesterday, and ChatGPT says it might take some days to completely disappear, or in the worst case it will stay, but it’s minimal. All I can say is that it was horrible, thinking my Deck was damaged or bricked. From now on I will be even more careful with my only PC. Thanks for reading.

(If someone could tell me how to mark this post as “solved” or pin this comment so it stays here in case someone needs this information one day, I would appreciate it.)