I have had EXACTLY the same problem. An incomplete cycle, followed by two flashing lights - In our case, the detergent door doesn't open either - A half way sloution for me, has been to put on a delicate wash (the one with a wine glass symbol). Only this program does a complete wash. I got an independent dishwasher repairer to come and take a look - he cringed when he saw it was an integrated Diplomat - He said he's had an unusually high number of complaints about them lately - He stripped it down and said that all the components were working fine, so it had to be something to do with the circuit board - He said I could pay to change that, at the risk of still not solving the problem. I'm in limbo as to whether to pay MFI to fix it (which could cost up to £200) or buy a new one - If I do the latter, it won't be a Diplomat! - Sorry I can't be of more help.
Lee, January 2007