We can't get our tv to recognize our dvd player anymore (worked fine for about 4 years). The dvd player and cables have been checked on another tv and are fine. We have tried bypassing all cables inside walls and plugging directly into the front of TV and it still won't recogized it. Someone has told us the input board is probablly out. Any ideas? If it is the input board, is that something that would be easy to fix ourselves?