My new 550Ds arrived and although the viewfinder worked at first after setup and a bit of initial testing it went and i can now only get the LCD, i have studied the manual but cant find anything i have done to do this,later some more testing using the LCD to film in best quality with has only given me the conclusion that if it has to go back it will be to stay as my HV30s PQ is just as good exept in low light. 