Encouraged (and emboldened!) by my discovery and use of FreeNAS for a home server I decided to try OpenBSD on a Lenovo X250 which I bought second-hand. I fitted an SSD in place of the HDD.
OpenBSD installed very easily but by this time I’d discovered TrueDOS. I downloaded a USB Desktop image for 17.12 and wrote a memory stick using dd as per the handbook. It fails to run the graphical installer - I get a brief band of mixed grey pixels occupying the lower third or so of the screen then nothing.
Lest it could have caused the problem I created a Live GParted USB and deleted the contents of the SSD - same result, sadly.
I am new here and have some experience of Unix and Linux. Any ideas what I may have done wrong, please?