Repair AEG L86800?

My aeg washing was working perfectly, then at the end of the program the display indicated rinse cycle but nothing was happening and door was locked. I performed emergency drain and checked pump for blockage-was ok. I managed to open door with a small force on handle. I checked power and fuse all ok. I removed top cover for visual check every thing seemed ok. There is no display function and seems like total internal shutdown. I suspect door locking safety feature faulty but not convinced it would cause total loss of all functions. I have checked main power and continuity of conductors upto filter capacitor, that is ok. Please can you help identiy the problem so that i can replace the faulty component responsible. May be there is a reset procedure? Thank you.