Aiwa NSX-DS55 CD Shelf System "hissing stereo speakers" Questions

Record player sounds scratchy and tinny when I play records on the record player the sound is scratchy - is there something I can adjust - I was not given any kind of an instruction manual with the ...

...stereo I have an AIWA NSX-DS55. It has been in storage for almost 2 years. I hooked it up today in my house, and no music will come through the speakers. The unit is plugged in and all the speaker ...