How can I fix my proline dishwasher?

My proline dishwasher beeped as if it had completed its cycle but it has not completely emptied and although power is still reaching machine and you can set programme nothing happens. If I open the door it beeps which is its normal and the first two light flash which it has always done. When I opened the door when I thought the cycle was completed it showed the first two lights and the last light flashing but I dont know what this mean.