Diplomat ADP8322 Start Indicator Flashing?

Hi, My diswasher starts the wash cycle then stops and drains. The start indicator lamp then flashes, machine constantly bleeps. Read instruction manual which tells you to clean the filters. Done all that, filters now spotless, drain tube unblocked but the start lamp still flashes and machine continues to bleep (how annoying is that?) Tried resetting as per instruction manual, no joy next step big hammer. Has anyone any tips?