get gray screen on some hd channels

[schu132]

I recently completed a self install of a slimeline and hr20/700. I can receive some hd channels like 73-ESPNHD 70-HBOHD 72-ESPN2HD-75-TNTH 76-HDTH 79-HDNET.
But others like T101HD-101 HBOHD-501 HBOWHD-504 MAXHD- 512 MAXWHD-514 I get a gray screen that locks up my reciever for about 2-5 minutes. Are HBOHD-70 and HBOHD-501 on different transponders? I thought it might be a signal strength issue here are my numbers:
101º
1-8 94 91 91 89 91 95 89 96
9-16 91 94 92 85 94 96 92 96
17-24 94 0 94 92 92 95 94 96
25-32 95 63 94 0 95 97 92 96

110º
1-8 NA NA NA NA NA NA NA 96
9-16 NA 95 NA 96 NA NA NA NA
17-24 ALL NA
25-32 ALL NA

119º
1-8 ALL NA
9-16 ALL NA
17-24 NA NA NA NA NA 95 80 94
25-32 0 94 95 91 100 95 73 95

99(c)
1-8 88 91 85 85 86 89 85 83
9-16 87 90 83 80 92 92 NA NA
17-24 ALL NA
25-32 ALL NA

99(s)
1-8 99 0 97 0 95 0 NA NA
9-16 NA NA NA NA NA NA 0 0
17-24 0 0 0 0 0 0 0 0
25-32 NA NA NA NA NA NA NA NA

103(s)
1-8 0 0 0 0 0 0 NA NA
9-16 NA NA NA NA NA NA 0 0
17-24 0 100 0 0 0 0 0 0
25-32 NA NA NA NA NA NA NA NA

103(c)
1-8 95 91 91 86 91 87 89 86
9-16 91 85 88 82 91 95 NA NA
17-24 0 NA NA NA NA 0 NA
25-32 ALL NA

I have VOD and some of the shows i download play fine but some have the gray screen. Could this be a codec problem with my dvr? I read somewhere that different hd channels use different mpeg codecs. Is the same true for VOD? I've been tweaking my aim and the transponders I get seem to have good numbers. Could it be a bad dvr?
Any help with this would be greatly appreciated.

 

[daverp]

Did you install the B-Band converters? or if using an SWM LNB / Switch did you leave them off? The channels listed as working are MPEG 2 and the one that don't are MPEG 4.

Have you checked the display resolutions to make sure they are set to something you tv can display?

 

[schu132]

Did you install the B-Band converters? or if using an SWM LNB / Switch did you leave them off? The channels listed as working are MPEG 2 and the one that don't are MPEG 4.

Have you checked the display resolutions to make sure they are set to something you tv can display?

have the b-band converters on both tuner inputs. not using a switch, single tv install 7 foot rg6 coax run from dish to receiver. Have not grounded the ground block yet could that cause this? I have a 1080p tv conected to the receiver via an hdmi cable all resolutions are checked on the dtv dvr.

 

[schu132]

Did a system reset from setup menu and the hd channels came in for about 45 seconds hbohd-501 then maxhd-512 Then the picture froze but the audio kept on when i tried to rewind nothing happened i then tried to change to another hd channel and got the gray screen. seems like a problem with the dvr or firmware.