I have a Samsung SIR-T150 tuner. Lately I've been having some annoying problems with tuning certain channels in the DC area. It started with our local CBS affiliate showing up as "no signal" and then also happened to the ABC affiliate. After a few days of this, I had the Samsung do an auto-search for channels, and CBS popped up again, even though I had just tried going to the right channel by hand and it couldn't find a signal. Now, my NBC affiliate is acting screwy... my tuner light is green, I can tune to the right channel, signal strength is as good as it ever was, but the channel shows as "no signal." And ABC is still MIA. Is this a hardware problem? Is there anyone out there in the DC area that has had similar problems? Is this operator error? Thanks for the assistance.