macbook pro does not take any command on startup
Ok I never ran into a problem like this.. My macbook pro work on its own HDD but does not take any commands on start up (i.e. Pram seeting, Holding C to boot from OSX or D for diagnostics) I used several different hard drives but it wont recognize any of them accept the original that is on it?? The other Hard drives are Apple hard drives too.. so I think this is all related.. ANY advice or anyone ran into the same problem??