Emax

While playing with my 4Mb 2212 today, I noticed that the E3 note is sticking and will not turn off.  It was working fine yesterday.....

I had a quick look and re-cleaned the contact spring, but that has done nothing.

What is going to be the problem here, or how can I go about finding what the problem is?  I have the Emax II diagnostics guide, but that did not provide anything useful.

(It is only the one key on the whole keyboard - all others are still working).

I was hoping it would be something easy, as I have no real electronics skills to play with this myself, and being in Sydney Australia I'm not sure who/where in this part of the world to take it to for repair.

Any help/ideas gratefully received!

Steve