It seems to me that your confidence in the pointing of your dish is likely misplaced. In other words, you cannot say that you are pointing the dish in the right direction until you have locked on a transponder and adjusted for the best signal quality. Any geometric device such as compass, phone app, is only giving approximate directions. We cannot state that enough.
Beside the great advice given above (known transponder), I will add my advice: get one of the cheap satellite finders - they can be found online for less than $10. The thing plugs in between the LNBF and the receiver, and as the dish gets a signal and loses it, the gadget will make squealing sounds. It is not a very accurate tool by any mean, but it is still very convenient. With that in place, you move the dish slowly sideways until you get a higher pitch noise and then lose it. Go back to the location of the highest pitch, and do a blind scan. You might get something - in that case look up the listings on lyngsat and try to identify the channels and figure out what you are pointing at. If you get nothing, it might be that you are pointing at something that your receiver can't tune to, like a DirecTV satellite for example. In that case, move the dish again, maybe a a slightly different elevation, and look for another high pitch sound location.
I find that in that part of the sky, the easiest satellite is Galaxy 3C @ 95W, with the Chinese channels. Anyway, once you have been able to receive something, anything, it's easy to hop to the other birds