MV1F vertical lines missing

I have this MV1- "A"? motherboard which recently has developed this issue where some vertical lines are missing from the image, it only appears on texts and certain ingame graphics, I have checked the cartridge slot for cold solder joints but that doesn't seem to be problem here as the issue is present even without any game inserted:









any clues?

Check the fix layer lines.

Sorry but I'm a noob at repairing this kind stuff, I have only worked on monitor chassis, can you point me out the part I should look at if I post a picture of the board???

found the issue, FIXD6 and FIXD7 broken traces.

Note: make sure that you and only you handle the gaming stuff when moving to a new house, f**k me....