Why won't my DK Country 3 display video?

I have a working original SNES and I use it fairly regularly. I have a DK 3 cartridge that was working for a while but recently started to fail. It starts up and plays the intro audio but won't display a picture. I have tried cleaning the pins and all the regular methods. The reason I don't believe this is just a faulty cartridge is that I borrowed the same game from a friend (he does not use the game) and it has the exact same error. Other games like Mortal Kombat 3 and DK1 and 2 work fine still.

Someone help!