Problem with leftest column not visible

See this picture below. The leftmost and almost the whole second leftmost column is invisible. Any Idea for how to solve this?

I’m trying to install Arch on a HPE Proliant Microserver Gen 8. In BIOS, everything looks fine.

I might mention that things did not work very well with a vga->hdmi adapter. Then I could not get neither the Bios screen, boot menu nor Linux installer. I bought an older screen to get that part working. With the newer screens, I only got the splash screen on startup, and then later Windows (which was installed when I got the computer) showed up.

Though not a preferable solution, maybe it’s possible to do something with bash to right shift everything?
enter image description here