I have an alba LCD tv approx 2 years old, has been tuned to freeview. and working with no problems for a long time Today it has stopped picking up any digital channels, there is sound of one channel but the picture jumps and is not viewable, tv does not respond to my remote trying to change channels or manually the buttons on the side, I have tried to pull up the menu but this also isn't showing on the screen so I am unable to attempt to retune or anything Would be very grateful for any ideas as to why its suddenly done this? Thanks

Televison & Video - Alba - LDVD1538WDCH LCD TV