Vintage Simmons Drums (UK) Users Group

I got a MTM on Ebay.  It powers up (LED comes on) but the LCD dose not light up or have any kind of read out on it.  Tha battery has leaked and the fuzz (battery acid?) has moved on to a few of the resistors that are close to it.  Please see photo link below.  I can trigger my SDS7 via a pad through the MTM.  Is this a fix I can try to pull off?  Or should I get my money back?  I pay around $200 USD.

Thanks for any help bringing this 1980's monster back to life.

http://s156.photobucket.com/albums/t15/midiizer/?action=view¤t=IMG_1167.jpg