Beko DW450 Dishwasher no power?

My Beko DW450 dishwasher stopped working half way through a cycle, without draining. Pressing the main switch does not illuminate the power led, and the buttons do not do anything. Power is getting past the main switch to the main pcb. I have tried a replacement main pcb and led pcb but it still does not function. What else could it be?

ggg
January 2011