I know at least 995 of you are familiar with this thread: http://www.dbstalk.com/showthread.php?t=169655 That problem was solved by replacing the DVR. Sunday afternoon, the same thing started happening with the DVR in my bedroom. Since this week I am not laid up sick with the flu, I began advanced debug before posting for help (nothing like being accused of being an idiot simply for fishing for ideas in advance). I started with: 1. Normal restart 2. unplug for half hour, restart 3. replace the BBCs 4. Swap receiver location 5. Remove my signal locker 6. Remove the signal locker AND WB68, running straight from the dish to the receiver None of that changed the issue. If I run a SINGLE line, I get a signal lock. If I run ANY two lines of the 4, one of the two tuners will not lock the signal, and the signal is always from transponders in either the 103c or 99c locations (will show zero, and signal meter will show it flashing 94%+ back to zero). The rest of the signals are fine, as are the rest of my receivers. Knowing full well last week the issue was the tuners, the debug may have been over the top, but isn't it highly coincidental I lose two HR2x series receivers within a week of each other? For those that don't want to read the other thread, the issue is, after a couple hours, the HR21 will start pixelating, going gray, briefly issue a 771, go back to normal picture, and cycle through this endlessly, but only on national HD channels (but not all). I know I'm going to have to call DirecTV again and make use of my protection plan, but I am fishing for anyone that has seen anything like this, and if it is remotely possible that something in my setup can cause this. This setup is 2 years old in its current configuration (signal locker, wire plant, new dish, and last device added). Lastly, for those familiar with the other thread, this time I am going to start the issue on the phone, at home, and with enough time available to bring it to conclusion in a single phone call. It is clear to me that I cannot trust DirecTV to keep\read notes from prior e-mails or calls and do a multi-stage debug.