This lens was bought new in 2000 and used occasionally for a couple years, then sadly it sat in a camera bag with its caps on for a few years untouched. Last time I used it it worked fine but when I tried using it again on my new 7D it doesn't autofocus. It's doing the same thing on my old SLR as well. It just whirs and whirs if it's way out of focus but if I move so that it's closer to focus it chirps and chirps like a whispering chipmunk. Manual focus, of course, still works. Could it be something simple like cleaning the connections? Simple for someone who knows how to do that I guess, I never have so I don't know. I'm short on cash for a bit so I'd rather try the simple things I can, maybe, do before taking it to a shop where I could get charged a pile for a simple cleaning.
Any thoughts? Any other info I can provide that would help you help me?