After reading up on the ST7920 controller, and using the U8GLIB library, I managed to get my screen working. The problem is that vertical shadows (and some horizontal) appear under all visible pixels.
I checked voltages, removed the small contrast pot available, and added my own, added a large cap to filter the voltage. Still nothing.
I am starting to think it is a timing issue with the library. I hate reinventing the wheel, and don’t want to have to start from scratch.
Has anyone seen this problem?
Thanks in advance for all your help,