I have had this same problem. The board is bad. This is what I found.

If you disconnect the motor and turn on the speedo the lights and everything looks to work as normal. Solder the motor back up with the unit on and the motor will work but cogged like the sensor motor is bad. If you turn it off and back on again the the lights of 1,2 and 6,7 flash again. The only fix is warranty repair or Tekin's exchange program.