Did you ground yourself before wokring on the computer? Static electricity is the enemy of all repair attempts. I not only gorund myself but wear thin rubber gloves (you can buy them at the auto parts store for $12 for 100 pair!!) to prevent component a failure do static discharge. It doesn't take much to destroy a HD/CDrom controller chip, mobo, or other plug in component board!!!
Noli Nothis Permittere Te Terere!!
EVGA 680i, Dual EVGA 8800GT'S (650/950), 4 gigs OCZ DDR2 1066, Intel Q9450 at 3.8 Ghz, Koolance Water Cooled, Dual Plextor16x DL DVD+/-RW. Dual WD 250gb 16mb Cache Sata 3.0. 3DMark06 score = 19,168.