Check if hard drive is re-seated properly. For installation of the hard drive, you may refer to the service manual of computer:
Please ensure to follow the safety instructions in manual.
Once the hard drive is seated properly, you may check in system BIOS if the hard drive gets detected. To access system BIOS:
If the hard drive gets detected, you would need to re-install Operating system and drivers on it. For more information on Operating system re-installation, you may refer to link: http://dell.to/Qe7jyP
To know the installation of drivers in correct order, you may refer to link: http://dell.to/tIauHN
Please reply for further clarifications.
Thanks and Regards,Chinmay S#iworkfordell To know more about Dell’s products, services and drivers & downloads, please go to http://dell.to/10GaKAc