[access2008]

Hi. I have a Dell inspiron 6400 ( laptop ), 2 weeks ago when i tried to start up the machine not boot and a screen said No Boot sector on internal hard drive, No bootable devices press F1 etc... so, I put the hard drive in other laptop and I can see 2 partitions, I recovery all my files and then I formated the drive, put again in the Dell and reboot and said again same... I have a Hiren disk and tried to boot with them, but give a error when the disk tried to load the cd drivers ( Itried whit differents boot disk and ever is the same error ) The memory is ok ( 1 GB ) the processor is ok. I install other hard disk and is same.. so I think the disk is not the problem. The bios version is A17 and is the most newer. Please some give a help ???