Macbook No Bootable device

[Farrgo]

I recently booted my mac book to a Knoipix cd to show off to some friends how capable the macintosh hardware is. But now when I try to boot it back to Mac OS, it gives me a "No Bootable device -- insert boot disk and press any key" error.

The logical response would be to Option boot it, as par the answer i found here, but it's a company machine, not my own, so there is a firmware password on it which I can not unlock.

I've tried resting the PRAM, but it has never worked. It's a late 2009 white plastic uni-body macbook.

Any way around this?

 

[old-wiz]

Do you mean knoppix? a Linux CD? Sounds like the Linux OS wrote something on the osx disk and munged it.

If you were able to boot a Linux CD, why can;t you just boot the OSx DVD?

 

[Farrgo]

Because it's a company machine, I don't have the disks.

And yea, I just failed at spelling Knoppix in the OP.
Knoppix won't even mount the HDD unless you tell it to, which I didn't so there's no way it could have messed with the boot table or anything like that.