OK, here is what I would do if I was in you spot.
Remove the motor and set the dish directly on the mast. Set the dish at 43 degrees, aim at 194 degrees, double check your LNB settings, make sure you are hooked only to the L side of the LNB (no switch), set the receiver to the strongest transponder as mentioned above. If you don't find anything there, I would go to 72W AMC-6 (192 degrees magnetic) and try for 12144 V 2573 S.R. When, you have found a signal this way, you will see the elevation that the dish needs to look at, so that with the motor it can be set at the same elevation in the sky. I don't know why you can't set your dish to 24 degrees with the motor. However after getting it setup without the motor, it should become apparent where the satellite is in the sky.
Bob
Remove the motor and set the dish directly on the mast. Set the dish at 43 degrees, aim at 194 degrees, double check your LNB settings, make sure you are hooked only to the L side of the LNB (no switch), set the receiver to the strongest transponder as mentioned above. If you don't find anything there, I would go to 72W AMC-6 (192 degrees magnetic) and try for 12144 V 2573 S.R. When, you have found a signal this way, you will see the elevation that the dish needs to look at, so that with the motor it can be set at the same elevation in the sky. I don't know why you can't set your dish to 24 degrees with the motor. However after getting it setup without the motor, it should become apparent where the satellite is in the sky.
Bob