The flashing option lights indicate an error condition.
The basic error is encoded in binary using the vertical lights which will be either on or off. (least significant digit at the bottom)
yep i know that but this is just the horizontal lights none of the vertical lights come on and it dosn`t show a last error code detected . Its not stopping it still goes through program it`s just customer complaining of flashing lights.
Possible front PCB. Could still be the main PCB. Hard to say without checking the stored error log.
Have you a used front board from a similar model to try?