S4lad :
The Original Ralph :
did you look in disk management (my computer right clik, then select "manage" then disk management
If it's listed there, look at the box at the left and see if it shows "online" or "offline"
if offline, right clik inside that box and select online
It only shows my HDD
the other obvious items to look at, 1) change sata cables, if possible, move the sata cable from the SSD to the HDD and vice versa
and try another sata port as well