Black screen after upgradinn graphics drivers

Hello, I’ve installed openSUSE Tumbleweed some days ago and for a time it run perfectly, yesterday I decided to update the graphics driver of my video card (An old NVIDIA 9400 GT) and after restart and GRUB, nothing, only a black screen. The system is not locked up i guess, at least CAPS and NUM LOCK keys lights turn on and off if I press them. I tried booting with “nomodeset” and “nvidia.modeset=0” parameters, and also with the fixes found in this article https://en.opensuse.org/SDB:Configuring_graphics_cards#Troubleshooting_things_to_try , and still nothing. I dont want to do a fresh install, so Im asking if there is some other solution. Also, I’m currently using Arch and Windows 10 in other HDD, if its relevant to do any fixing.

Update driver from what version to what version?
The Tumbleweed repo http://http.download.nvidia.com/opensuse/tumbleweed/x86_64/ currently carries the 384.98 version, but that does NOT support the 9400 card apparently: see http://www.nvidia.com/download/driverResults.aspx/126577/en-us
You need a 340.xx driver apparently, maybe the 340.104 http://www.nvidia.com/download/driverResults.aspx/123703/en-us so you should install it “the hard way”.

And, by the way, welcome to the openSUSE forums!