I have computer issue?

okay like the name says.. i have problem >,< i have computer and its customer build. and i decide to re-install my windows because it was glitching.. i put in a new o.s cd in my cd-rom and reboot my comp.. and every thing went blank.. screan dont respond and keybord isnt working. i tryed rebooting it with no cd in his cdrom but it was 100% useles.. idk what 2 do with it. Can some one help me?