How can I tell if my computer motherboard is faulty? How to tell if the motherboard is broken

Steps to determine the fault of the computer motherboard:

1.Open the case, unplug the hard disk data cable and hard disk power cable, then remove the additional independent graphics card, press power, and the fault is still the same;

2.Remove the two pieces of memory on the motherboard, wipe the gold finger of the memory module with an eraser, and remove the oxide;

3.Clean the dust on the memory slot and motherboard, plug in a memory module and turn it on;

4.Plug in a memory module and turn it on, but the fault is still there; Replace the test with a good spare memory module;

5.Unplug the mouse and keyboard, leaving only the memory necessary for the host to boot properly, as well as the CPU and host power. Press power on, if the fault is still there, you can probably judge that the motherboard is burned out.

How to repair the computer motherboard:

1.First of all, carefully observe the various slots, fans, chips, etc. of the motherboard for signs of damage: whether there are burned, burned, blistered, broken wires, corroded sockets, and capacitors on the motherboard

Whether the BIOS battery is charged or not. If there is obvious damage, it is necessary to carry out targeted repairs.

2.If there are no obvious signs of damage on the motherboard, then use a soft brush to clean the dust of the motherboard, and check whether the motherboard is normal after cleaning. If it is normal, it is a fault caused by dust.

3.If it is still abnormal after cleaning the dust, then use a multimeter to measure whether the power supply voltage of the motherboard is normal (+5V, +12V, +, etc.). If there is an abnormal voltage, check whether there is a fault in the power supply and its motherboard electrical circuitry.

4.If the electrical voltage of the motherboard is normal, then power on the motherboard to check whether there are heat-generating chips in the motherboard. If there is a hot chip, the CPU motherboard maintenance first checks whether there is a signal at the input and output terminals of the hot chip.

If there is an input signal and no output signal, check whether the heating chip has a clock signal. If there is, the chip is damaged and can be replaced; If there is no clock signal, check the previous stage of the chip along the line to which the chip is connected until the faulty component is found.

How to tell if the motherboard is brokenLet's take a look at those who are interested.

1. If the motherboard is broken, it will not be powered on, in this case, the computer's power on and off button and restart button have no effect. If it happens suddenly, check that there are no problems with the wiring of the switch, and the motherboard is damaged.

2. If there is a problem that cannot be started, check the wiring of the terminal port and the motherboard, sometimes the motherboard is not powered on and is caused by dust or loose lines. Reseat the line connector on the motherboard.

3. When the motherboard cannot read the memory card.

This problem will also occur when it does not match the hard disk, and if the hardware has been replaced recently, check whether it matches the motherboard.

4. If you haven't changed the hardware recently, you need to reseat the wiring once. Poor contact is the main cause of problems with computer motherboards. Because there are a lot of interfaces for motherboard parts.

5. Then check whether the solder on the motherboard falls off and is damaged. When the solder on the motherboard falls off, it cannot conduct electricity. That is, it can't be turned on when there is no electricity.

6. Check whether the interface connected to the computer cable on the motherboard is damaged. The interface is composed of multiple components, and if there is a problem, it will not be able to boot.

7. Use a screwdriver.

Connect the powersw pins on the motherboard. See if the motherboard can light up, and if it lights up, the monitor can be displayed. If it can, it's a short circuit in the wiring.

1. If the motherboard of the Zen wheel bureau is broken, it will not be powered on, in this case, the power on and off button and restart button of the computer will have no effect. If it is a situation that occurs all of a sudden, the motherboard is damaged if there is no problem with the wiring of the switch.

2. If the problem of not being able to start now, check the wiring of the wiring port and the motherboard, sometimes the motherboard is not powered on and is caused by dust or loose lines. Reseat the line connector on the motherboard.

3. When the motherboard cannot read the memory card and the hard disk do not match, such a problem will also occur, if there is a recent replacement of hardware, check whether it matches the motherboard.

4. If you haven't changed the hardware recently, you need to reseat the wiring once. Poor contact is the main cause of problems with computer motherboards. Because there are a lot of interfaces for motherboard parts.

5. Then check whether the solder on the motherboard falls off and is damaged. When the solder on the motherboard falls off, it cannot conduct electricity. That is, it can't be turned on when there is no electricity.

How to identify and choose a good computer motherboard.

It's very simple, when you turn on the machine, touch the south bridge and the north bridge to see if the temperature is a little high. Hehe, thank you for adopting.

Use the motherboard test card to see if it will light up, see if the motherboard chip will be hot, and unplug the memory to see if it will be alarmed, and that's it.

If the motherboard is broken, it won't start, and there is no sound prompt.

1. When the computer can't be turned on, the black screen keeps restarting, etc., you can judge that the computer motherboard has been damaged. In general, the causes of motherboard damage are: solder falling off, resistive components burning, etc.

3. Computer motherboards are divided into two types: commercial motherboards and industrial motherboards, which are installed in the chassis and are one of the most basic and important components of the microcomputer. The motherboard is generally a rectangular circuit board, on which the main circuit system of the computer is installed, generally there are BIOS chips, IO control chips, keyboard and panel control switch interfaces, indicator plugs, expansion slots, DC power supply connectors of the motherboard and plug-in cards, etc.

5. The motherboard adopts an open structure. Most motherboards have 6 to 15 expansion slots for PC peripherals to plug in control cards. By replacing these plug-in cards, the corresponding subsystems of the microcomputer can be partially upgraded, so that manufacturers and users have greater flexibility in configuring models.

The type and grade of the motherboard determine the type and grade of the entire microcomputer system. The performance of the motherboard affects the performance of the entire microcomputer system.