bubbaagum :
Thanks for your answer.Basically what is happening is once the unit has been turned on it starts going through the initial start up procedure and then stops with the error no hard drive found . It is allowing me to enter the boot sequence etc but without finding the drive in either slot primary or secondary.
You might try to do a simple reset, other than that I
Can only suggest you find a reliable hardware guy, seeing as how the unit was dropped, and what may have been dislodged or damaged.
Reset:
*Take out the battery,
*Remove main supply,
*Hold power button down for 30 secs,
*Put only power supply in, do not put battery in
*Turn laptop on, wait for boot to complete
*Put the battery in.