I have Gateway NV53A24U laptop with Windows 7 Home Premium 64 bit. I recently removed my keyboard because I was having USB problems, when I put it back together I didn't have full use of my keypad? I removed it again to be sure the ribbon was secure, and it seems to be. Any ideas on how to troubleshoot this? I did notice that my ribbon seems to have a crease in it, would this cause some keys not to function? Thank you for any help.