ASUS A7V600-X Motherboard need assistance

[ava8harrierusmc1]

Ok a ask me to help fix computer hand built by his Grandfather now i got the computer it worked but on opening it and checking it hard drive came lose now it wont boot up to Xp operating system, now I don't have the recovery software nor does this thing have a floopy drive like the user guide says that the only thing that came with this I don't want to break this kids heart and i don't want people thinking i don't know what i'm doing so help please is the a way to get this thing to boot without a operating disk or a recovery disk Plus i relly su*k at DOS ALSO! HELP ME PLEASE HELP ME

 

[r_manic]

Can't you just try reconnecting the hard drive? Maybe you forgot to plug back in its power cable.

 

[grossemesser]

or the other end to the proper SATA connector... if not, try switching connections, both power and data
Maybe adjust you BIOS boot options if something went wrong