42PF5521D/10 menu problem

[danielcla]

Hi,
I have a 42PF5521D/10. I used to be able to scroll up and select a menu option with the right arrow (on the source screen). Up Down and right now don't work and i now cannot change the menu. the signal is getting through as the tv green led blinks. but the menu doesn't change? Any ideas.
Thanks Daniel