Apple I-mac 2007 turning on with a grey screen and then turns blank after 2-3 secs
This morning when I tried to turn on my Imac 2007, it turns on with a grey screen and then after a second or 2, it just turns black. Nothing works. Even restarted several times but to no avail. I can hear error noises when I press a key on keyboard, but the screen doesn't show up. So, I guess it might be a screen problem? Do I have to replace the whole screen, or is there a fix without having to replace the screen?
Kindly help me out, I have lots of important data inside it and I don't wanna lose it.
Thank you
iMac, OS X 10.11