The motherboard does not recognize the hard drive

Computers are often unable to start and occasionally enter the system, but will soon crash. Use anti-virus software to kill, not normal.

This situation, you can restart the computer, into the BIOS, check the hard drive parameters are correct, found that the parameters are correct, but do not recognize the hard drive, only the hardware check.

Open the chassis, unplug the power cord from the hard drive from the data cable, and turn the hard drive back on or off. Remove the hard drive and install it on another computer to work properly, which means there is no problem with the hard drive. The hard drive is then reconnected to the faulty computer with another data cable, or unrecognized. To view the motherboard, the hard drive is connected to the IDE1 interface, the optical drive is connected to the IDE2 interface, the CD-ROM can be used normally, and the hard disk can be used.

Remove the motherboard, find a lot of dust on the back, IDE1 interface solder, covered by dust. Clean the dust, reinstall, start the computer, successfully into the system.