u/Tomaswalker-mcp1848

I brought a FDS copy of Metroid for £39 at a retro gaming market in Milton Keynes on Saturday. Side A works perfectly fine and even had saved from the previous owner. But when you put side B it runs the game but you’re greater with a blue screen and then if you’re lucky a pixelated version of the game before it crashes. I tried my other games and they work fine, what’s causing the problem?