AAAARRRRRRRGGGGGGGHHHHHH Cant Start up my mini

[SW9]

Hi everyone, I am having a really bad day. My Intel Mac Mini wont start.
Basically last week my external hd broke, so today I got a new one (Western Digital 1tb). I plugged it in and opened Time machine to back up my data, I pointed it to the new drive and it started backing up but then got stuck after 100g. I just had the spinning beachball for ages so was forced to do a hard restart.
Now it wont restart at all and am left at the beginning white screen with the apple logo with the spinning thing.
I have tried restarting with nothing connected but to no avail.
Also I dont have the leopard disks either.
Am in screwed????
I am running the latest Leopard by the way.

Thanks In advance

Sw9

 

[donuttakedonuts]

I hear they're doing great things with buildings built out of bricked minis these days. It looks like you need the leopard disks or you're dead. There are other solutions, however, I can't mention them here.

 

[SW9]

Now my mac is powering of after 30 seconds of the grey screen aswell.
Any ideas???
Thanks