IBook squeal

[tom samson]

I tried using BTV Pro and had to force quit and now anytime I go near 
the right speaker i get an horendous squeal. I have ditched the 
preferences of BTV Pro and then the program then all the preferences 
run Techtool Pro, then Permissions and I think the next move is 
reinstall the system 10.3.8 itself.
Any ideas before that last step
tom