Win7 system boot prompt can not find the hard drive what to do

1, hard drive data line and power cord loosening, oxidation or broken needle

Workaround: Try swapping power connectors, data cables, or ide/sata interfaces.

2, may be some motherboards turned off the SATA interface, can not find the SATA hard drive

Workaround: To open the SATA interface in the BIOS.

3, overclocking the system to cause hard drive does not work

Workaround: Revert to default settings or reduce overclocking.

4, when the hard disk used long, the back of the circuit board of the gold finger oxidation caused by poor contact

Solution: Remove the circuit board and clear the oxide on the gold finger.

5, the computer may be too many IDE devices, causing its initialization time increased, and the corresponding self-test time does not increase, resulting in the system can not detect the hard disk or detection timeout

Workaround: Extend the time setting, find the "Boot delay time" option in the BIOS or "IDE Delyay Times", and the motherboard BIOS without this option can also set the memory self-test number to 3 times to extend the self-test.

6, when the computer for a long time useless, and in a humid environment, causing the components on the hard drive damp, but also will appear hard drive can not detect the problem

Solution: First disconnect the power supply, and then use the hair dryer evenly to heat the hard drive to wet.

7, may be the power quality problems or load too much equipment, resulting in low voltage output +12v hard drive can not work properly

Solution: Replace the power supply with good quality or high power.

8, in the BIOS "standard CMOS feaures" page, the hard drive is set to No

Workaround: Set to Auto.

9, IDE jumper set incorrectly, hard disk and other common data cable IDE devices have the jumper set to "master" or "Slave"

Workaround: Change one of the IDE jumpers;

10, the hard drive the reason for the physical bad way

Solution: It is recommended to take the maintenance of professional computer repair points.