I'm working on a DMC. Car doors are cycling closed about 6" and then reopening then closing 6" at floor. It looks like previous company put a new upgraded door board for the HD85. When operator does this WD1 and WD2 flicker at the same time doors bounce back and forth? No door errors but a few errors occur on the CLC. Door operates normal on test. I'm thinking they installed wrong level board as a replacement? Looks like the direction I'm headed? Can you shed some light?