Good news winnie, following your advice I ran:
sudo pacman -S linux515-nvidia-390xx --overwrite=*
And the GUI is restored whoo hoo
Seems like the problem was due an incomplete upgrade after run
sudo pacman -Syu
Thanks a lot for all your help
well, put the command i ran to one of your messages and i give you the solution tag without problems
my idea was that anyone who visits the entry get an idea of what command run to solve the issue