If the lid lock starts to flash it means an error has occurred, it could be anything. Your best bet is to go into diags and check the stored codes. This is the left, right, right, right, left, right entry method. Then turn dial until cycle complete is lit, press start, turn dial once clockwise and that is your first code. Codes are tricky on this because there is no display so it will be flashing two sets of the progress leds. What is the flash?