I have a standard DTV receiver that I use both in the home and in the motor home. It worked well for about a year but now I can't get the signal to lock in. In addition, my satellite finder has started to act strange. After aligning the satellite to my local settings (150/43) and turning the receiver on, the satellite finder light comes on as expected. However, within 15-20 seconds, there is a single click noise from the receiver and the satellite finder goes dead. After 15-20 minutes with the TV screen showing the message "Searching For Satellite" the message changes to Ext 771. Then I am able to get into the menu and go to the test sat signal strength page. Once it starts working through the transponders, the satellite finder comes back on. At that point I fine tune the signal. Howevder, all the transponders show zero. In my Motor Home, the satellite cable as well as my off air antenna and cable all feed into a splitter before going to the TV. In an attempt to eliminate the dish and wiring as the problem, I hooked up a friend's portable DTV dish directly to my receiver. Had the identical problem with the sat finder coming on then shortly after shutting down. Additionally, could not get a signal to lock in even though the sat finder showed a strong signal. Any thoughts or ideas would be appreciated