Hi all,

I have an elderly Casio scientific calculator (fx-3400p) which I've owned
since new in 1991 (so I'm quite attached to it). Lately, the numeral '2'
key has become a bit flaky inasmuch as every press doesn't always
register 100% of the time any more. I know these things are dirt cheap to
replace, but I've got used to the layout of it and don't really want to
upgrade to something new if it can be fixed reasonably easily.
Any ideas what the problem might be?
thanks.