My 'ribbon" in the motherboard is falling out

If your gameboy is anything like mine, the bracket that the ribbon cable connects to is white and there is a darker gray retaining clip behind it. You need to put the ribbon cable between these two pieces and push down on the two edges of the darker retaining clip. It will probably take a few tries and you may have to catch your buttons. Mine seem to enjoy falling out when I open my gameboy up. Hope this helps.