What to do if the CPU fan turns the motherboard does not start

What to do if the CPU fan turns the motherboard does not start

1, CPU aspects of the problem

CPU does not have power: Use the multimeter to test the three (or one) field tube around the CPU and three (or one) rectifier diode, check the CPU is damaged.

CPU socket has a shortage of needles or loose: This type of fault performance is not lit or irregular crash. You need to open the upper cover of the CPU socket surface and carefully observe whether there is a deformed pin.

CPU Socket Fan Fixed clamp fracture: You can consider using other fixed methods, generally do not replace the CPU socket, because manual welding is easy to leave trouble. SOCKET370 CPU, its radiator is fixed through the CPU socket, if the fixed spring plate is too tight, the demolition must be careful, otherwise it will cause plastic clips break, there is no way to fix the CPU fan.

CMOS set CPU frequency is not: As long as the elimination of CMOS can be resolved. Clear the CMOS jumper is typically near the lithium battery on the motherboard, its default position is generally 1, 2 short circuit, as long as it is changed to 2, 3 short-circuit a few seconds to solve the problem, for the old motherboard, such as the jumper can not find, as long as the battery off, to boot display into the CMOS settings after the shutdown, The battery can also be installed to let the CMOS discharge.

2, motherboard expansion slot or expansion card problems

Because the motherboard expansion slot or expansion card problems, resulting in the card, sound card, such as expansion cards, the motherboard does not respond, resulting in no display on the boot. For example, brute force disassemble the AGP video card, cause the AGP slot to crack, can cause this kind of trouble.

3, the memory aspects of the problem

Motherboard does not recognize memory, memory corruption, or memory mismatch: Some old motherboards are more critical of memory, once plugged into the motherboard can not recognize the memory, the motherboard will not be able to boot, and even some of the motherboard has no fault prompt (tweet). In addition, if you plug in different brands and types of memory, it can sometimes cause such failures.

Broken pins or burns in memory slots: sometimes because of excessive force or improper installation method, the reed in the memory slot is deformed and broken, so that the memory slot is scrapped. Note: When inserting the memory strip, should force vertically, do not sway around. Before unplugging the memory strip, be sure to unplug the power from the host, prevent the use of the STR function when the memory is charged, burn the memory bar. In addition, do not install the memory back, so as not to burn the memory after the battery. But now the motherboard, generally have to prevent the design, will not insert the reverse.

4, motherboard BIOS is damaged

Important hardware data is stored in the BIOS of the motherboard, and the BIOS is a more vulnerable part of the motherboard, which is vulnerable to damage and can cause the system to fail to function.

This type of failure typically occurs because the motherboard BIOS is damaged by the CIH virus. General BIOS

Solutions that additional computers cannot start:

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 computer is used for a long time, it may be loose or too much dust, can be the memory to go out, clean up and then installed, general problems can be solved, if the new assembly on the computer should first check whether the CPU plugged in or replace the CPU, And the computer is using the situation of the CPU damage is relatively rare (except for human damage), when the damage is usually more than the smell of burnt, if you have just upgraded the BIOS or encountered CIH virus attack, this should consider the BIOS corruption problem (BIOS inexplicable damage is also some), Methods to repair the BIOS many magazines are introduced to do not repeat; To confirm that the CPU and BIOS is not a problem, it is necessary to consider the CMOS setup problem, if the CPU frequency settings are not correct will appear this fault, the solution is to remove the CMOS information, both the CMOS discharge, General Motherboard has a CMOS discharge jumper, if not found this jumper can be taken down the CMOS battery, discharge time not less than 5 minutes, and then restore the jumper original or reinstall the battery can be; BIOS and CMOS are no problem to consider the power problem: the PC power supply has a special output signal, known as the Good (PG) signal, if the low level of PG signal duration is not enough or no low level time, PC will not be able to start 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.

1 long 1 Short: Description memory or motherboard error, a memory to try.

1 Long 2 short: Indicates that there is an error in the display or display card. Check if the video card and the monitor plug are in good contact or use the replacement method to determine if the video card and monitor are damaged. 1 Long 3 short: Indicates keyboard controller error, should check the motherboard.

1 Long 9 short: Description motherboard flash RAM, EPROM error or BIOS damage, replace flash RAM. Repeat short ring: Indicates the motherboard power supply is problematic.

Uninterrupted long sound: Indicates that the system has detected a problem with the memory bar, reinstall the memory bar or replace the new memory bar to try again. AMI BIOS 1 Short: Description memory refresh failed. Replace the memory strips.

2 Short: Description memory ECC more error. Set the memory ECC checksum option to Disabled or replace the memory in the CMOS. 3 Short: Indicates system basic memory check failed. Swap memory.

4 Short: Indicates system clock error. Replace the chip or CMOS battery. 5 Short: Indicates CPU error. Check to see if the CPU is plugged in properly. 6 Short: Indicates keyboard controller error. The motherboard should be checked.

7 Short: Description system Real mode error, can not switch to protection mode. 8 Short: Description shows memory error. There is a problem with memory, try replacing the video card. 9 Short: Description BIOS chip test and error.

1 Long 3 Short: Description memory error. Memory is damaged and replaced. 1 Long 8 Short: Description shows test error. The monitor data cable is not plugged in or the display card is not in a good cell.

The phenomenon four: The system can start, has the video, appears the malfunction prompt, then may according to the clue to judge the fault spot.

The following are some common troubleshooting tips:

1, the hint "CMOS Battery State Low"

Reason: CMOS parameters are lost, sometimes can be started, using a period of time after the crash, this phenomenon is mainly due to the lack of CMOS power supply. For different CMOS power supply methods, take different measures:

1. Welding Battery: Soldering a new battery with soldering iron; 2. Button-Type battery: direct replacement; 3. Chip Type: Replacement of this chip, preferably with the same model chip replacement.

If the replacement of the battery after a long time and the same phenomenon, it is likely that the motherboard leakage, can check the motherboard on the diode or capacitor is damaged, but also jumper use of external batteries, but these need to have a certain base of hardware maintenance to complete.

2, prompted the "CMOS Checksum failure" CMOS BIOS inspection and read errors; hint "CMOS system Option not set", CMOS systems not set, hint "CMOS Display Type mismatch", CMO The setting of the display type in S is inconsistent with the actual measurement; prompts the "CMOS Memory Size mismatch", the main memory on the motherboard is not the same as that in the CMOS; prompts "CMOS time & date not set". All of these need to be reset to the CMOS.

3, prompted the "keyboard Interface Error" After the crash reason: the motherboard on the keyboard interface can not be used, unplug the keyboard, reinsert after the normal boot system, the use of a period of time after the keyboard no response, this phenomenon is mainly a number of times to unplug the keyboard to cause the motherboard keyboard interface loose, Remove the motherboard with a soldering iron can be, or a live unplugged keyboard, causing the motherboard on a security block (marked on the motherboard for FN), replaced by a 1 ohms/0.5 watts of resistance can be.

4, self-test process interrupted in Xxxk cache This indicates that the cache on the motherboard is damaged, you can set the "External cache" item in the CMOS settings to "Disable" fault can be excluded. Similarly, when a self-test board part is interrupted, the part can be considered damaged, and the solution can generally be shielded in CMOS, and if it is not possible to block the part, it is best to replace the motherboard.