Searching for Sat - Can't get HD reception for some stations

I've got the same problem it seems as so many others.

A week to two weeks ago I lost reception on some HD channels

and have subpar reception on other HD channels.  For example, I've lost

HD reception on 242, 248, 355, and 359 and no doubt others.  There is

spotty reception on 331 HD and no doubt others.

I have an HR-20 HD DVR.

Below my ID info are my transponder readings on both tuners.

David St Gemme

959 Seena Ave.

Los Altos, CA 94024

650-390-015

Satellitetransponders (32 total at 101º)

Tuner 1

1-8    77 82 68 91 63 91 66 89

9-16  68 85 72 89 76 93 72 95

17-24 79 40 74 96 73 95 75 92

25-32 82   0 85 40 86 92 75 95

Tuner 2

1-8    77 85 68 93 62 91 66 91

9-16  67 85 73 91 75 94 72 95

17-24 79 40 74 97 73 95 76 94

25-32 82   0 85 44 86 95 74 95

Satellite transponders (3 total at 110º)

Tuner 1

1-8 NA NA NA NA NA NA NA 91

9-16 NA 91 NA 91 NA NA NA NA

Tuner 2

1-8 NA NA NA NA NA NA NA 91

9-16 NA 91 NA 92 NA NA NA NA

Satellite transponders (11 total at 119º)

Tuner 1

17-24 NA NA NA NA NA 75 87 77

25-32    0  79 88  74  77 76 85 79

Tuner 2

17-24 NA NA NA NA NA 75 87 77

25-32    0  79 88  76  77 76 85 79

Satellite transponders (16 total at 99º(s))

Tuner 1

1-8      0   0    0    0    0    0 NA NA

9-16 NA NA NA NA NA NA 68    0

17-24 75 77   0    0    0    0 59 51

Tuner 2

1-8      0   0    0    0    0    0 NA NA

9-16 NA NA NA NA NA NA 64    0

17-24 77 80   0    0    0    0 60  51

Satellite transponders (14 total at 99º(c)

Tuner 1

1-8    45 47 51 52 42 47 47 50

9-16  43 47 47 47 47 50 NA NA

Tuner 2

1-8    46 49 51 51 42 48 49 51

9-16  43 47 47 47 47 48 NA NA

Satellite transponders (16 total at 103º(s))

Tuner 1

1-8      0    0    0    0   0    0 NA NA

9-16 NA NA NA NA NA NA  85    0

17-24 82 69    0    0   0    0  86  72

Tuner 2

1-8      0    0    0    0   0    0 NA NA

9-16 NA NA NA NA NA NA  61    0

17-24 85 77    0    4   0    0  59  77

Satellite transponders (16 total at 103º(ca))

Tuner 1

9-16    24 0 42 19 22 0 33 12

17-24  22 0 37   0 23 0 33   0

Tuner 2

9-16    23 0 11 16 22 0   6 12

17-24  23 0 15 12 12 0 18 11

Satellite transponders (14 total at 103º(cb))

Tuner 1

1-8    42 33 43 33 40 33 45 36

9-16  44 35 49 36 43 35 NA NA

Tuner 2

1-8    30 35 30 21 43 23 47 37

9-16  28 37 36 33 43 38  NA NA

8