I have a HiDef dish and service, using a Zinwell multiswitch to send a signal to 4 places... 2 wires to each place... which works for both my newer HD DVR boxes and my 2 old SD boxes... one of which is the old style HD box . My HR10-250 "forgot" that it was active last Friday... I called DTV to have it activated, and had to unplug/replug the power to get the box to "see" the dish connection . When it happened again, I removed it and replaced it with another HR10-250 I had in storage . The replacement worked for a day, and then did the same thing . Is DTV sending a signal to deactivate OLD receivers, to force people to upgrade?