How to tell if the north and south bridges of the motherboard are damaged

This is to use a special diagnostic card, which is generally sold in computer cities, and the following is the use and judgment of the diagnostic card under the PCI interface.

A. Caused by poor contact of the CPU seat.

b. Overclocking the motherboard.

c. The BIOS program is incorrect.

d. The chip is damaged.

e. The South Bridge chip is damaged.

F. The control bus of the CPU is wrong, and the resistance value is carried out, and there is no short circuit or open circuit.

g. The Northbridge chip is broken.

C1 or D3** overhaul.

A. The BIOS program is wrong, whether the BIOS socket is in good contact B. Whether there is mechanical damage or oxidation in the memory slot.

c. Whether the power supply of the memory is normal.

d. The line between the memory slot and the north bridge.

e. IoThe chip is damaged.

f. The north and south bridges are soldered, pressed by hand, and reset at the same time, sometimes it may be judged that the G and North Bridge chips are bad.

h. The South Bridge chip is broken.

i. Whether the exclusion next to the CPU is damaged.

j. The PCB is disconnected.

C1 to C3 or C5 cyclic jumps.

A. The BIOS program is incorrect.

b. The serial port chip is damaged.

c. The chip is damaged.

d. The chip of the north and south bridges is damaged.

e. Whether the crystal oscillator is normal.

b0** a. Test the data load voltage of the memory.

b. Clear CMOS

c. Test whether the power supply of the North Bridge is normal.

d. The north bridge is bad.

e. North bridge virtual welding.

25** A. Test the power supply of the AGP core.

b. North Bridge power supply.

c. Brush BIOS

d. The north bridge is bad.

It doesn't light up after walking od.

A. Test the resistance and resistance between the PCI slots.

b. External frequency and multiplier jumper.

0b、31**。

A. The BIOS program is incorrect.

b. The chip is damaged.

c. The north and south bridges are damaged.

d. Whether the motherboard is compatible with the graphics card.

e. Check the power supply of the North Bridge.

f. Whether the PCB is disconnected and there is conductive material on the board.

g. The graphics card slot is damaged.

2D** A. Test the AD line of AGP.

b. Initialize the IMTR signal.

c. The power supply of the north bridge is abnormal or the north bridge is damaged.

Does not light up after 2b** is displayed.

A. Refresh the BIOS

b. Bad clock generator.

c. Clear CMOS

d. The power supply of the north bridge is abnormal or damaged.

Display 50**.

a. Damaged or bad.

b. The power supply of the south bridge is abnormal or the south bridge is broken.

c. The BIOS program is broken.

d. The north bridge is bad.

Show 41**.

A. The BIOS program is corrupted and the BIOS is flashed

b. PCB disconnection.

c. CPU is damaged.

d. The quality of the memory module is not good.

e. Poor contact with the north bridge.

bf、02**。

a. Be clear about CMOS settings.

b. There is a problem with the CMOS circuit of the motherboard.

6. Ideas for intermittent troubleshooting of motherboards.

1) There is a lot of dust on the motherboard.

2) The CMOS battery voltage is insufficient.

3) South and north bridges, CPU seat virtual welding.

4) Poor power supply or power filtering of the motherboard.

5) Defective crystal or its resonant capacitance.

6) Capacitor bulging or poor capacitance.

7) The power supply IC is bad.

8) i o bad.

9) South Bridge is bad.

If the South Bridge is broken, it will generally be super hot, so you can know it by touching it with your hands.

How to determine if the bridge of the computer motherboard is operating properly:

1.The boot fan turns but the monitor does not display, it may be that the memory module is loose, wipe the gold finger with an eraser and plug it back in to see how the situation is, if the fault is still the motherboard is broken.

2.Pressing the power button does not turn on at all or there is no response The motherboard power pin shorting also does not have any response, it may be that the north bridge is burned.

3.After booting up, the BIOS shows garbled characters, which is generally due to the fact that the capacitors on the motherboard are broken, and the maintenance cost is not high. Open the case to see if the capacitor on the motherboard is bulging or leaking, and call js to replace it.

4.Unplug the device other than the CPU and memory to turn it on, see if there is a display, and listen to the motherboard if there is an alarm sound, if there is no display and no alarm sound (except for no buzzer), it is very likely that the motherboard is broken.

5.Remember to check whether the power supply of the host is damaged, the inspection method is green and black shorting, the power supply is good if the power supply fan is turned, and if it is not turned, the power supply is broken.

The communication between the north-south bridge chip and the processor is the closest, and the role is to improve the communication performance and shorten the transmission distance.

The north-south bridge chip is an important part of the motherboard chipset, which is generally located on the motherboard far from the memory slot, that is, on the side in front of the main chassis. Compared with the north-bridge chip, its amount is not large, so the south-bridge chip generally does not cover the heatsink, but now the south-bridge of the high-end motherboard also covers the heatsink.

Audio controllers, keyboard controllers, real-time clock controllers, advanced power management, etc., these technologies are generally relatively stable, so the south bridge chip may be the same in different chipsets, and the difference is only the north bridge chip. So now the number of northbridge chips in the motherboard chipset is much more than that of southbridge chips.

Use a multimeter to measure whether the resistance of the south bridge can be turned on, if not, it means that the south bridge is burned out! ~~

Open the computer case Find the Nanqiao chip Touch it with your hand Pay attention to the static electricity on the body before touching It is not broken The Nanqiao chip is not broken The capacitance is broken down by the static electricity on the body Under normal circumstances, the temperature of the Nanqiao chip is not very high If it feels very hot, then more than 90% of the Nanqiao chip is broken.

The south bridge is mainly used for the IO of the motherboard, that is, the input and output. If you completely break the motherboard, you can throw it away. The general questions are:

Can't find hard drive, optical drive.

The keyboard and mouse are abnormal.

Enter the system or enter the system freeze (blue screen).

There are many ways to identify the North and South Bridges, but there are also simple ones. First remove the computer cover, turn on the computer and press the north and south bridges with your thumb to feel the temperature. If the temperature is very hot, then there is no hope, if it is average, it may be normal.

Very hot hands means hot like fire.

The motherboard capacitor or other chips are burned Identification method: Open the box to see if the capacitor on the motherboard is open or leaking liquid If it is to replace the capacitor Try it It is best to go to a professional place to repair the motherboard and let a professional check it If the motherboard has a warranty It is best to find a dealer or manufacturer.

The south and north bridge chips are burned and the motherboard is finished, and if you can see it, it must be burned.

The so-called main board bridge is divided into south bridge and north bridge, first of all, you must be clear about the respective roles of the north and south bridges.

Northbridge is mainly responsible for the interaction between memory and CPU.

The role of the South Bridge is to be responsible for the interaction of graphics cards, sound cards, network cards and other hardware.

For example, your machine often crashes when it is turned on, enters the system blue screen for no reason, reinstalls the system and still does not solve the problem, and it is normal for the memory to be used by other machines, then it is possible that there is a problem with the Northbridge chip.

Yes or your machine suddenly has no sound, the hardware information displayed by the system does not read the hardware of the sound card, and the current sound card is basically integrated with the motherboard, at this time, it is likely that there is a problem with the south bridge.

These are only based on the hardware principle to preliminarily judge, not 100% accurate, to correctly detect the problem, you need to use special equipment, here I will skip first, if you are interested in research, you will communicate privately.

The memory hangs on the north bridge, and it can't be detected if it's broken, and it can't be turned on directly. The Northbridge chip determines the computing speed of the computer.

The main thing is to determine the performance of the computer.

The Southbridge chip determines how much more powerful the computer is.

Less, because it connects multiple external devices. Connect.

The more peripherals there are, the more power the computer has.

So the North and South Bridge chip is broken, this computer.

It's wasted! Change the board.

The south bridge is a power workstation, and if the south bridge is broken, it will cause the machine to crash and the heavy one not to turn on!