Open view failure

4 days ago my decoder started acting up indicating no signal. I borrowed a friends decoder and it worked perfectly. I again plugged my decoder in did a complete check and still it indicated no signal. A friend stated that he is aware of several persons complaining that shortly agter the decoder warranty expires the decoder stopped working. I contacted openview and their operator stated it is my problem as their system indicates I am connected so my system is at fault. Please assist as I had my system checked and all is fine. Kind regards