SV 8000HD problemI lose signal on 129 after about one minute. I use a DishPro Plus 1000.2 lnb with a single connection to the box. On 129 I scaned 206 channels including HD. After scanning, I select a HD channel sit down and it goes away. I lost all signal. I checked connections. Did a factory default and reinstalled the factory bin. I did a hard reboot and installed the latest SW and channel list. Still the same problem! I would appreciate any suggestions.