hello, Ive owned this set since 1997. Its teh 40" tube set. Recently the pic has taken a while to focus. Today the pic is completely out of focus and their is a loud cracking/arcing sound from the back . I was wondering if their is a way to tell if its the picture tube or flyback . Is their a source for these flybacks if it is bad. Is the set worth fixing? Any help would be appreciated. thanks in advance! JOhn Ross