Just got HDTv satellite dish not to long ago. Everything was working great up to about 2 weeks ago. HDTV comes in great - pressing the guide button brings up the guide. However pressing the guide button on my existing receivers and the guide comes up but the in-guide picture goes blank. I also get a message on top of the guide that say's "aquiring information". But I can move around in the guide while this is going on and select a channel. Selecting a channel makes the picture go blank with "aquiring satellite signal" at the bottom. After a period of time the picture comes back. I have checked the signal strength on all the receivers and get levels up in the 80's. I have tried unplugging the affected receivers for 1 minute and then plug them back in with no effect. Anybody have any suggestions?