This has happened five times since I installed my 811 this week. When I put the 811 in the standby mode, upon returning, and activating the power remotely or manually, nothing happens. All that I get is a black screen/no audio. Depressing the power button for several seconds in attempt to soft boot has no effect. This is a cardless 811 so I can't reboot by pulling the smart card. I have to power cord boot. Outputs: The 811 is connected to my TV by S-video. RCA right and left stereo cable. Phone cord & Power plugged into a properly working surge/spike protector. Properly grounded. Inputs: The 811 is connected to Three dishes (Dish 500 for 119/110, Dish 300 for 148, Dish 300 for 61.5) through a DP34 (119/110/148) switch cascaded to a DP21 (61.5). At the 811 it is diplex-ed for terrestrial reception. Dishes and switch are properly grounded. Previously, I had a model 510 in service at the 811's location with the same wiring configuration. I never had any problems. I have since tested my model 510 and model 311. They work fine with the with the connections as described above. When using the 811, sometimes when I change channels from satellite to OTA digital ( no analog OTA's programed), the audio/video cease, the 811 becomes non-responsive and seems to do a reboot (1 - 5 progress screen appears then it down loads the EPG data) and returns to the satellite channel. Any help/knowledge is appreciated in hope of avoiding the CSR/Tech. roulette process. I've discovered that my OTA favorite list does not function as if it does not exist. I've attached three pictures for illustration. First shows the OTA favorite with white square blocks where the letters norally appear. The second shows selected channels to save. The third shows an error screen 066. 05-15-05 Addition: I have determined two problems that are causing the problem as described above. I fixed one, the other is beyond my control. I checked my cabling from the receiver to the switches to the LNBs. I discovered that I had a 2 foot RG-59 cable running between the dish 2 port of the the DP21 and the DP34 receiver port. I changed it to RG-6U. This resolved the black screen when powering on the 811. The second problem is that one local OTA digital channel KIXE 9 causes the 811 to lose audio/video, become non-functional but the 811 automatically re-boots within a minute or two and when it returns, the OTA digital channel 9 in gone and is re-mapped . This happens once in the morning and once in the evening, every day. I have to re-Scan/Add the channel back as it re-maps differently in the morning and evening. KIXE broadcasts on digital channel 18. The 811 re-maps it to 09-01 HD and 09-02 SD in the morning. In the evening the 811 doesn't re-map and just shows 18(D) with no subchannel. Something may be changing in the PSIP. During the day, their broadcasts are is SD only but in the evening they broadcast PBSHD which is in outstanding high definition. My other HD units work fine with KIXE and they remain properly mapped to 09-01 and 09-02.