Channel keeps changing. When I go to change the channel up, it wont stop it keeps going until i

Question

When I go to change the channel up, it wont stop it keeps going until i hit enter. Does anybody know what the problem is? Is it a fuse or something because the green light keeps blinking after you stop the channel. I have a 32 inch LCD LG TVI have a Digistar brand T.V and the channels wont stop changing... i have tried everything and the only time the channels stop changing is when i hit menu!! But cant watch it with the menu screen up... can someone please help me????????????????????Thank you so much