Hi... A year ago my wife's beloved (by her) TIVO style HR10-250 started to have problems. Plus, of course, it was only MPEG-2 so she couldn't see the MPEG-4 HD content... So, we switched her over to an HR20 and what they sent out was an HR20-100... It worked for three months and then quit. (In another room, we've had an HR20-700 for quite some time and it's worked and still works fine)... They sent us out a replacement for the HR20-100 and it was yet another HR20-100... Now that one has worked fine for a little over three months but just yesterday it started hanging momentarily while playing back a recorded program.... And while it is "hung" you hear a very high pitched sound... So my guess is we are about to have yet another failed box... Any ideas as to what the likely culprit might be that would be making this high pitched sound??? The hard drive?? Can these hard drives be replaced??? And I'm hearing about using external drives... Anyway I could use an external drive to help me in such a circumstance as I am describing?? I am fearing the Directv is putting out a lot of junk and I might get interested in trying to do my own repair... Is the problem I am describing well known??? And if this one goes toast, can I whine and ask for something other than a -100 model as a replacement??? I pay Directv a lot of money and I'm starting to get a bit tired of their less than stellar equipment... Any help would be much appreciated... thanks.. bob...