I recently bought this nice game on cassette and tried on some of my M100, and immediately noticed strange artifacts on some units, text would shift, lines or dots would appear. It seems artifacts appear on some LCDs and do not on others. I tried swapping LCDs and problem follows the LCD, "good" LCD works fine with any motherboard and "bad" always has artifacts. No artifacts in M100 menu or standard programms. So what can it be?
https://youtu.be/MCzEvpL9LFI
