My Macbook refuses to start from the HD

[chuknorriss]

When I turned on Caliope -my macbook- yesterday in the morning, she appeared to have problems to boot, there was a grey bar which has never appeared before, the grey bar was loading but hen it reached half way, everything stopped and Caliope crashed -automatically turned off- Been reading about the global crashes, I'd installed SL last weed so I think that's the prob.

I've posting cause I've a LaCie External HD and I could log in using it, I can also log in on my windows bootcamp partition which is called Mathusalem.

Now If I send my Mac to apple repair, there is any need to backup Mathusalem? As it is a partition drive.

Any help is welcomed

 

[harry*333]

if you send it to applecare backup everything theres a good chance they might replace the hdd or wipe it