Just had comcast installed last Saturday, i'm now on my 4th dvr, 1st one couldn't get On Demand, 2nd one had a broken face plate, 3rd one Dvr didn't work, this one I can't get Guide data or get the menu bar, two calls to tech. support got the usual request unplug unit and wait 45 minutes. naturally it didn't work. They will send out tech. support on Thursday. is there any thing I can do other than unplugging the unit again. to force a guide download ? I'm trying to be patient but this is getting ridiculous