Awkward booting issue

[Mark]

> (...snip...)
> > Disable everything you can to reduce the attachable devices and see
> > if it will still boot. This will help identify which device if any
> > is causing the hang
> 
> Yes, I considered this. But even after having disabled everything
> that's possible in the bios, the boot issue persists...
> 

Any more suggestions? I'd really like to get this solved, please...