Macbook pro wont load, just gets to a white screen with apple logo

Hello,
I put my Mac to sleep last night. I am trying to turn it on now but it won't load.
The bar comes up at the bottom, fills about 20%, dissapears and then the spinny globe stays there forever, it will not load.
I have tried booting up by holding shift or x and no change.
Worthy of note, I installed leopard also last night.
Ive tried putting the leopard disc in, its being read but nothing changes on screen.
Ive tried holding command + p + r.
Ive tried unplugging, replugging.
Holding alt and choosing boot from disc or efi boot goes to the same white screen.
Holding c makes the disc drive make alot of noise, same white screen with nothing happening.
Nothings happening
Message was edited by: azz0r

azz0r, which OS originally came installed on your MacBook Pro?

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Message was edited by: burakbey

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