My HD DVR just starting giving me the 771 searching for signal message. I rebooted this morning and it worked until this afternoon and now it is doing it again. Signal is fine as other TV's work and show good strength. DTV support says its my multi-switch thatis built into the dish and they need to send someone out to fix it. Earliest service call is almost two weeks from now! What do you guys know about the multi switch and does this sound like the issue? I have the slimline 5 LNB dish and using HR20-100s DVR.