 Hi, this is Kevin. Sometime if you have a cartridge not recognized problem, it may be the back of your electronic board is missing one of the pins like this. You can get a replacement from the link I'm going to post below. So let me show you how this thing works. So this is a ECB board. The brass pins in the back of the board is sort of in the middle. And what you do is you can put your finger underneath the pin and just lift it up. And it's going to slide out. Here's a top down view of the slots that you can put a GBA. Basically, if you can put in the slot and then just push straight down and you'll be able to do it. Remember the pins in the back is sort of in the middle. And the pin in the front is kind of on the bottom. OK, let's do it on a real machine without removing the ECB board. Actually, I flipped too hard. And so the whole thing fled out. That'll show you how easy it is to do that. This guy landed on the floor. Let me put it in. So make sure you know which one is front, which one is the back. Back is kind of the pins in the middle. So I put in the slot and push down. As you can see, how easy it is to get those things move around. And also how easy it is to break one of them. OK, let me show you how to remove them one more time. See, that's how easy it is. Hope you enjoyed this video. Cheers.