First, I would make sure you updated your database. (Things/Freqs could have changed)
Second, make sure you are selecting the appropriate services you want to listen to.
(But remember to many services and you may just be missing action due to a list that's to long)
Then check these things:
Look at the Attenuation Display on the top line, Does it have a RED Dot next to it?, if it does, press the Atten and turn it off.
Press Range, press the + button to display Range 30.0 miles(Or whatever would work)
And don't let it get you frustrated, most times it's something simple.