data recovery

I have a customers HP dv6045nr laptop tat will not boot. When you turn it on it gets to the Windows XP screen, then turns off, as it is turning off you see a flash off an error screen. I ran a diagnostic program and there are no devices on the PCI buses. No memory controller,bridging devices, serial bus controller, network controller, NOTHING. The first thing I would like to know is how can I get the data off. I have tried recovery programs, and Linux rescue disks. The only one that I can access the system with is GRUB, but I am not familiar with it and am kind of lost with the commands. Second, is the PCI bus disabled and if it is how can it be repaired or does a hardware change need to take place?