Can anyone repair/replace the soundcard of an MR Vader FX lightsaber?

[Black Rain]

Alas, probably my most-used prop replica (other than the Luke ESB FX) has stopped making any sound.

If anyone can help repair this, or point me in the right direction, I'd be ineffably grateful.

PM or email: tim UNDERSCORE braithwaite AT btopenworld DOT com

Thanks!

 

[razorsharp192]

I've got a few from 2007 vader fx sabers. pm me if interested