Lexicon Alpha Personal Recording Studio "sound voices faint" Questions

...faint high pitched sound My lexicon alpha is recording a faint high pitched sound with my voice over recordings. I was wondering what is going. The tech at lexicon told me that that was a design flaw ...

...form is damaged from heat.Move back to the amp input and try again- this time listen for a clipped sound if the speaker checked out okay.  It would sound like the Charlie Brown adults in the ...

...voices. Oh, and one key sticks. 1) what causes this 2) who is my best bet for a correct fix - electronics specialist, music store, ??? 3) who can likely fix it right, for the least $$$ (I'm broke) ...