When I turn it on, the Nintendo logo is a black bar, can this be fixed
So I don't have any games for it, but I've been wanting to sell this game boy and I was wondering if there were a way to fix it. When I put batteries in it, and turn it on a black bar falls from the top of the screen (I'm assuming it says gameboy, or Nintendo.) Also the battery light is red. I'm not sure if that's good or not, but I'm just wondering if you could help me. Thank you for your time!!