SNES cart not working....please help!

[Alphonse101]

Hi!

I wondered if you can direct me with a few tips with a problem I have at the moment.

I got a Demon's Crest on SNES, trouble is, it does not work... Here is what I can say so far :

-my console is fine, working and clean (and works fine with all my other games)
-cart has been cleaned and all contacts looks perfect
-there is no sign of damage or corrosion on the cart

Although!
-it seems one of the previous owner tried to change the internal battery (holding with scotch tape)

I know that normally even without a battery, the game should still work (but not save)

Am i overlooking something, what more can I check to figure if it can be salvaged?

Thanks!