Yes the coax cables were good as I used other ones too just to make sure.White coax cable....RG 56 ?
I use a .2db LNBF at least that it was advertised for, but thinking that it is a .4db or worse. Some companies may not be very truthful about specs. Besides I played with an 500 dish a while back using the same LNBF and still was able to get a few channels on 97w.
Are you sure that the coax you are using is good? To make sure take the coax off on both ends and look at the ends very careful...look for a bended center core, frayed strains of your shield that could touch the connector and /or center core etc etc.
Best would be to replace it with an known good coax.
Set the dish on a table to raise it enough to get a view over the railing to see if that helps any.
How far is the building away across the street ( your aiming direction ) and how tall is that building.
There are two condo buildings, the closest one and the one farther away. The two dishes of my neighbours are actually somewhat blocked by the same railing and buildings. But maybe because they are paid satellite with high frequencies they don't really matter.
Anyway, I'll try to raise the dish by putting it on the table or something.