iPod 3rd generation stuck on grey screen.

Hi, the other day I was listening to music when my iPod 3rd Generation flew out of my pocket (sweatpants) and dropped to the floor. It was fine after that but when i left it alone for about half an hour the blacklight turned off and my screen is now grey. It played music but i followed some tips and restored it so now no music is on it. It works fine if i put music back on it the only problem is the screen is grey. I have tried the "Toggle hold button then press Menu/And Center at the same time" and it doesn't change the grey screen. Help ?