Hi all, I have an issue with my dr.who. I don't know if It's a issue in opto board or Opto led is really clean. L1 75 is open the others closed. When I do the test on miniplayfield ccw down the l1 is turn on with the opto eject left (at the same time). I Should know how can solve this issue. Should I disassemble the opto bank?Or not?Thanks in advance.