Hi everyone!!

Long time ago i buy the MPE 65mm lens with the double twin MT-24 EX flash in France (Canon product) and now one of the double twin head flash is not working anymore. It's the "A" lamp (one is named "A", the other one "B"). The focus lamp is working (for both) but only the flash lamp on this "A" head is not.
How is it possible to change this flash lamp? I'm living in Perth.

I have no idea how to solve this problem. I found nothing on internet about this.

Thank you for helping me!