Troubleshooting computers that cannot be started

What if the computer doesn't start? Most of the friends who use computers should have encountered computers that could not be started, and were helpless in this case. So how to solve the computer can not start this problem? This requires the diagnosis and treatment according to the fault, understand the process of computer startup, fault on the good judgment, the following according to the symptoms began to diagnose, first from simple to copy to exclude, first learn to observe, and then to think, this is to solve the basic principle of computer failure.

Phenomenon One: The system can not start completely, can not see the power indicator light, also can't hear the sound of cooling fan.

At this time, first of all to see if there is no connection, there is no power cord loose, if not the basic can be identified as a partial failure of the power supply. Check: Power cord and socket whether there is electricity, the motherboard power plug is not connected properly, UPS is the normal power supply, and then confirm the power supply is faulty, the simplest is the replacement method, but the general user home can not be equipped with power supplies and other spare parts, at this time you may try to use the following method (

First the hard drive, the CPU fan, or CDROM, and then put the ATX motherboard power plug with a wire to connect two pins (the side of the plug on its own, the upper pins from the 4th and lower pins from the left to the right number 3rd, the direction must be correct), and then the ATX Power switch Open, If the power supply fan rotates, the power supply is normal or the power supply is damaged. If the power supply is not a problem directly short of the power switch on the motherboard of the jumper, if normal, the chassis panel power switch is damaged.

Phenomenon Two: Power indicator light, fan turn, but the monitor does not have obvious system action.

This situation if the use of a longer computer, may be loose or too much dust in the memory, you can go out of the memory, clean up and then install, general problems can be solved.

If it appears on the new Assembly computer should first check whether the CPU plugged in or replace the CPU, while the computer is being used to damage the CPU is relatively rare (except for human damage), the damage is generally more with a burnt paste flavor.

If you have just upgraded the BIOS or encountered a CIH virus attack, this should consider the BIOS corruption problem (the BIOS is somehow damaged is also the case), the method of repairing the BIOS is not repeated in many magazines; Verify that the CPU and BIOS are not a problem, you should consider the CMOS setup problem.

If the CPU frequency setting is not correct also can appear this kind of fault, the solution is the CMOS information to clear, both the CMOS discharge, the general motherboard has a CMOS discharge jumper, if cannot find this jumper can take down the CMOS battery, discharge time not less than 5 minutes, Then restore the jumper to the original or reinstall the battery.

If the CPU, BIOS, and CMOS are all well, consider the power problem: the PC power supply has a special output signal, known as good (PG) signal.

If the low level of PG signal duration is not enough or low level time, the PC will not be able to start the 2500-yuan Computer Configuration list.

If the PG signal is always low, the PC system is always in the reset state. At this time the PC also appears black screen, no sound, such as the crash phenomenon.

But this requires a professional maintenance tool plus some maintenance experience, therefore, the proposed substitution method; The power supply is not a problem to check whether there is a short-circuit, to ensure that the motherboard surface does not and metal (especially the installation of the chassis fixed point) contact. The motherboard and power out of the chassis, placed on the insulator surface, if it can be activated, the motherboard has a short-circuit phenomenon; If you still can't start, consider the motherboard problem, the motherboard is more complex, you can use the replacement method to confirm, and then replace the motherboard.

Phenomenon Three: Power indicator light, the system can start, but the system in the initialization of the stop, and can hear the chirping of the Beep (no video).

According to the peak-Ming code can determine the fault of the site. Ccid_page/award BIOS 1 Short Sound: Indicates the system is starting normally. Indicates that there is no problem with the machine. 2 Short Sound: Description CMOS Setup error, reset incorrect option.

Note : More wonderful tutorials Please pay attention to the triple computer tutorial section, triple Computer office group: 189034526 welcome you to join