There are various reasons for the failure, from external to internal, from mechanical to electrical, from software to hardware, to check and test. However, it is more important to guard against it, to improve the bad use environment, to change the bad habit of use, and to stick to the scientific and reasonable use of the computer to start, shutdown and operate. When working on a computer, especially when reading and writing data, you cannot suddenly turn off your computer, otherwise you may damage the drive (hard disk, floppy drive, etc.). You can't move a machine when it's working. Of course, even when the machine is not working, you should avoid moving the machine, because the excessive vibration will damage the hard disk type of accessories. In addition, you must shut down all programs and exit in a normal order before you can damage your application. To sum up, computer fault, there are complex faults and simple fault, most of which fault there are clues, and even some very obvious appearance, such as capacitor volume expansion, not pack type heat sink of power integrated block surface severe fever phenomenon. In fact, as long as we can "look, smell, listen, cut" and analyze seriously, most of these faults can be solved easily by simple means.
