HP Envy 15-EP0061NF 15-inch (2020) - Core i7 - Gen 10 (H) - 16GB - SSD 1 TB AZERTY - French

The computer works almost fine, but sometimes, when I switch between tabs, or when there's a more complicated process I'm starting, the computer turns off the monitor for 1-3 seconds. The first few days of use these blackout moments were very short, as if I blinked, but recently they have become longer, more frequent and of course more worrying. Unfortunately I would either have to repair the computer or hope to change it.