keyboard is dead and backlight is flickering

@walterjrgarcia the backlight flickering and keyboard not working could be a torn, loose cable as well as damage to the board connector etc. I suggest that you take a look at those things first. Remove the bottom case as show in step one on here Asus ROG Zephyrus G14 Thermal Paste Replacement check closely for any damage. Post some pictures of what you see with your Question. That way we can see what you see. Adding images to an existing question

Worst case scenario would be a new keyboard (upper case) or even a new motherboard. Let's check this all out first.