Need help! computer stuck on black screen with white dash

Ok so I was on my computer when I got a blue screen that said something about my hard drive trying to boot up in sleep mode or something along those lines. Now I can't get past the black screen with the white dash after the gateway logo comes up. I tried my recovery disk and reset it back to factory settings but no luck still doesn't work. Is it possible my hardrive is dead?

I have a Gateway dx4300 I also installed a new graphics card and power supply but that has run fine for about a year. Any help would. Be great and sorry this isn't the best written since I'm posting this from my phone.