The system does not boot after installing a new hard drive
Cause: The hard drive may not be connected properly, i.e., the data connector and the power connector could be improperly connected.
Solution: When installing a new hard drive, always double-check the connection of the data cable. Pin number one on the motherboard should coincide with pin number one on the hard drive. One edge of the data cable is marked red to indicate it as pin number one. While connecting it to the drive, make sure the red line coincides with pin number one of the drive and motherboard. Usually, the red line on the cable and the red wire of the power connector will be side by side when connected to the drive—this indicates a proper connection.