I have three HD DVRs from DirecTV. I think they are the 700 series, but I have two types: one with the vents on the top and two without the vents.
I got them about 2 years ago alone with the latest dish back then (not the newer slim line dish). All DVRs have the HD "brick" connecting the coax, and they are connected via a 6x8 multiswitch.
Recently, one of the DVRs is giving me intermittant 771 (searching for satellite signal) messages. It's definitely not weather related. I'll get the message on one DVR, but the other two are fine. I'm 99% sure the problem is isolated just with this one DVR. If I surf around, the channel will come in/out randomly. It's always an HD channel and it varies (e.g. could be a local channel, TNT, VH-1, etc.)
Called DirecTV about it and asked for a new DVR. They assured me it's either a dish pointing issue or a bad multi-switch.
Has anybody else had a similar problem? DirecTV tells me that since it's not definitely the DVR, I will have to pay for a technician to visit the house and diagnose the problem. My biggest fear is I pay for the visit and the guy doesn't find anything wrong when he visits.
Any suggestions out there would be appreciated. Thanks.