Hi there,
If you are not showing any signal at all on the Digibox, it could be a problem with the box itself, but you are probably on the wrong satellite.
There are a couple of nearby satellites which have limited transmissions, so I would have another scan around with the satfinder.
For 28.2E the dish face (with most makes of dish) will only be a few degrees off the vertical, leaning back by only a few degrees. The signal for this sat is very strong, so if doing a sweep it should beep the highest.
If sitll no signal at all, then check the connections to the box and also that the LNB power is switched on, may have inadvertantly activated the short circuit protection, so unplugging and reconnecting the box would solve that
Rolf