Flashing option lights is just a Power Failure notification. First I would verify that the water supply is turned on. Then I would check the float switch and make sure it's not stuck in the up position. If you have access to a multimeter, check for 120V at the fill valve when trying to start a wash. If no voltage reading at the valve, check to make sure the float switch contacts are closed when in the down position. If the valve and float switch check out, you may have a bad control board. If you have voltage at the valve, but no water coming in, your inlet valve needs replacing.