Motherboard failure does not boot how to do

Motherboard failure does not boot how to do

Computer boot motherboard does not start, no display, no alarm sound failure of many reasons, mainly have the following several.

Treatment: For the following reasons, exclude each.

(1) CPU problems

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) There is a problem with the motherboard expansion slot or expansion card

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) Memory problems

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. After the general BIOS is damaged by the virus, the hard drive data will be all lost, you can detect the hard disk data is intact in order to determine whether the BIOS is damaged, when there is a debug card, you can also use the card on the BIOS led light to judge. When the BIOS boot block is not damaged, the monitor does not light up after startup, PC speakers have "beep" beep; if the boot is damaged, then power and hard drive lights are on, the CPU fan turns, but does not start, at this time only through the programmer to rewrite the BIOS.

You can also plug in the ISA video card to see if there is a display (if prompted, you can follow the prompts to operate.) If there is no boot screen, you can make an automatic update of the BIOS of the floppy disk, refresh the BIOS, but some motherboard bios is damaged, the floppy drive does not work at this time, it is recommended to find service providers, with the write code to the BIOS update file to write in the BIOS.

(5) CMOS battery is in trouble

When the power switch is pressed, the hard drive and power light are on and the CPU fan is turned on, but the host does not start. When the battery is removed, it can start normally.

(6) Motherboard automatic protection lock

Some motherboards have automatic detection protection function, when the power supply voltage is abnormal, or CPU overclocking, adjust the voltage is too high, will automatically lock stop work. The performance is the motherboard does not start, at this time can be the CMOS discharge and then add electricity to start, some motherboards need to open the motherboard power, hold down the reset button can unlock.

(7) The capacitor on the motherboard is damaged

The

checks to see if the capacitor on the motherboard is bubbling or exploding. When the capacitor is burnt by high temperature due to high or long voltage, will bubble or liquid, then capacitance capacity reduction or loss, capacitance will lose the function of filtering, so as to provide load current in the exchange of components, resulting in CPU, memory, related board work instability, performance is easy to panic or system instability, often appear blue screen.