DSE GE6400 s/n DSE0900487. I recently bought a tv/dvd combo from **** Smith here in Western Australia for my elderly mother. It was a demo model in the store and was bought of the shelf already set up. Since then she has touched some of the buttons on the right hand side of the set and can no longer get DIGITAL TV. It will received ANALGUE. It keep coming up on the screen ENTER PASSWORD with a triangle thing with three crosses and when we try to enter number little X's appear. When finished and you switch to DIGITAL TV in goes back to ENTER PASSWORD again. We have tried using various numbers including 666 but still it doesnt want to receive DIGITAL TV. The DVD works ok. We cannot find the user manual and would ask if you can help with an answer thank you in advance Les Bushell