My 508 has been acting up. Can someone tell me what is wrong? Sunday evening it was recording a show for my wife. I tried to watch a previously recorded program and the replay would start and freeze, then continue and freeze. I finally gave up. After the record shut off I tried resetting it by pushing the power button for 15 seconds (whatever it took). Seemed to reset but after it went through all 5 signal acquisition levels the screen went black for a while and it all started over. It continues to cycle and no picture. The next day I unplugged it all day. After I plugged it back in, the picture appear UNTIL my wife tried to change channels. The same results of cycling. Unplugged it overnight and the same thing happened. I have tried removing the smart card. The 508 in another room works fine. No problems. Is it a lost cause? Thanks.