I have recently picked up a LW3 pinball and I have noticed some strange writing at the bottom of the DMD as per the below photo. There was an issue with the power supply board that was installed although I have for now installed a xpin power supply while I get the original board repaired.
Has anyone seen this before and if so what is the cause and what needs to be checked.
156DC5C2-F1DC-4CE1-8BC7-0D482606318D (resized).jpeg