How to use a multimeter to check for computer motherboard failure?

Many computer users often encounter situations where the computer cannot run properly due to motherboard failure. This article will conduct an in-depth discussion on this issue. PHP editor Xiaoxin will bring you a series of steps to use a multimeter to check computer motherboard failures. From identifying common symptoms of faults to actual inspection steps, the article explains in detail fault diagnosis and treatment methods. By reading this article, you can master the comprehensive and systematic fault detection process, effectively solve computer motherboard faults, and make your computer run more smoothly.

How to use a multimeter to check for computer motherboard failure?

Generally speaking, when repairing the motherboard, you must first look at it and then proceed according to the following steps:

First observe directly with your eyes to see if there are obvious signs of burnout. If there are thousands of Do not turn on the power and test it

After taking it out, there is no obvious burnout, and then dust the computer motherboard. Generally, the damage to the computer motherboard is caused by more dust, so we must pay special attention to this.

After dust removal, we need to use a multimeter to measure the resistance to ground, because it is safer to do so. Just connect the red test lead to any ground wire and the position of the screw hole. Then we measure the ATX power interface to see Check whether the resistance value is normal and make sure there is no large area short circuit on the motherboard before proceeding to the next step.

Connect the memory module, CPU, monitor and power supply to the motherboard to see if the motherboard can start normally and short-circuit our boot jumpers.

If it can be started, you can measure the memory, north and south bridges (now integrated in many motherboards), CPU power supply, CPU reset, and various interface circuits.

If we find that any of them does not have the correct power supply, we first measure the power supply, usually a field effect tube. We measure the resistance to ground. If the resistance is normal, then look at it. The turn-on signal means that each voltage group will have a main power supply and a turn-on voltage. Measure whether it is normal. If not, check whether the resistor, capacitor, diode, and transistor have broken down and replace it.

When repairing, check the ground resistance value and measure it multiple times, especially the motherboard, to avoid serial failures.

What does the motherboard display 60 mean?

Display code 60 means:

1. Set the hard disk boot sector virus protection function.

2. Through the test of DMA page register, the video memory is about to be tested.

3. Test the extended memory. Computer motherboard fault diagnosis cards are specially produced for diagnosing computer faults.

The working principle of the diagnostic card is to use the detection results of the BOS internal self-test program in the motherboard to display them one by one through codes.

If it is stuck at 60, it means that at least one of these tests has failed, but generally speaking, the possibility of encountering memory problems is greater.

How to tell if the motherboard of a computer is broken? Burn or not?

To determine whether the computer motherboard is damaged or burned out, you can follow the following steps:

1. Power indicator light: Check whether the power indicator light of the computer host is on. If the power light does not light up, there may be a power supply problem rather than a motherboard failure.

2. Fan operation: Turn on the computer host and observe whether the CPU fan is running normally. If the fan is not spinning, it may be due to a power supply issue on the motherboard.

3. Check the motherboard indicators: Some motherboards will have indicator lights or LED lights to indicate the status of components such as power supply, CPU, and RAM. Check these lights for any errors or unusual lighting cues.

4. Listen to the buzzer sound: If a buzzer is installed on the motherboard, a series of beeps will sound when the computer is turned on. If you don't hear any sound, there may be a problem with the motherboard.

5. Clean and reseat components: Check to make sure all slots and connectors are plugged into the motherboard correctly and securely. Sometimes, loose components can cause a motherboard to not function properly. You can try cleaning the connector and reinserting it to ensure a reliable connection.

6. Unable to boot or enter the BIOS: If the computer cannot be powered on or cannot enter the BIOS setup interface, it may be a sign of motherboard failure. You can try replacing other reliable power supplies and components to rule out other issues.

Please note that for non-professionals, it may be risky to determine that the motherboard is faulty or burned out and then repair it. If you are unsure or unfamiliar with how to do this, seek help from a professional computer repairman.

How to check whether the motherboard is good or not?

To detect whether the computer motherboard is working properly, you can use the following methods:

1. Power-on self-test: When you turn on the computer, if the motherboard is running normally, it will perform some self-test procedures , and usually some beeps will sound. If you hear normal sounds, the motherboard should be normal.

2. Good power supply test: Connect a good power supply to the motherboard and start the computer. If it can start and run, the motherboard and power supply are normal.

3. Observe the hardware: You can first check each Whether the hardware devices (such as graphics cards, memory modules, hard disks, etc.) can be recognized and run normally. If they can all work normally, then the motherboard should also be normal.

4. Signal indicator: Most modern computer motherboards are equipped with one or more LED indicators. These indicators are used to show whether the current motherboard is receiving appropriate power supply or working status signals. If the indicator light is normal, the motherboard is working normally.

5. BIOS physical examination program: BIOS contains some self-examination programs. After entering BIOS, you can diagnose and set up the system. If some error messages appear, you can determine whether the motherboard is normal. You can also reset the system, clear CMOS and other operations through the BIOS.

If none of the above methods can confirm whether the motherboard is normal, it is recommended to send the motherboard to a professional repair point for diagnosis and repair.

How can a computer tell that the motherboard is broken?

Determining whether the computer motherboard is damaged is not an easy task and requires certain knowledge and experience. The following are some suggestions to help you determine whether the motherboard is damaged:

1. Observation: First observe the appearance of the motherboard and check whether there are signs of burning, breakage or deformation. If there is obvious physical damage, the motherboard may be damaged.

2. Check the power supply: Make sure your power supply is working properly and connect the power cord to the correct connector on the motherboard. Test using a power tester or a power cord that is known to work properly. If the power supply is OK and the motherboard is still unresponsive, the motherboard may be damaged.

3. Check the capacitors on the motherboard: Check the capacitors on the motherboard (usually cylindrical components) for signs of bulging or leakage. If so, the motherboard may be damaged.

4. Detect the LED lights on the motherboard: If there are LED lights on the motherboard, you can observe whether they light up. If the lights that are supposed to come on don't come on, the motherboard may be damaged.

5. Check the motherboard speaker: If there is a speaker on the motherboard, you can listen to see if there is an alarm sound during the boot process. Different alarm sounds represent different faults. You can find out the specific meaning by consulting the motherboard manual or search engine. If there is no alarm sound, the motherboard may be damaged.

6. Try the minimal system method: disconnect all unnecessary hardware connections, such as graphics cards, hard drives, optical drives, etc., leaving only the power supply, motherboard, CPU, memory and monitor. If the computer boots normally under this condition, the problem may be with the disconnected hardware. If it doesn't start, the motherboard may be damaged.

7. Use the diagnostic card: Use the diagnostic card (if available) to detect the health status of the motherboard. Connect the diagnostic card to the corresponding interface on the motherboard, and determine the cause of the fault based on the code displayed on the diagnostic card.

If none of the above methods can determine whether the motherboard is damaged, it is recommended to send the motherboard to a professional repair center for inspection and repair. Please note that a motherboard failure may result in data loss, so be sure to back up important data before performing any operations.

What should I do if the motherboard detection fails when booting?

1. In the BIOS settings, usually the first major item, there is boot error detection. Generally, All Error is set. Just change it to No Error. It will not interrupt if an error is detected during boot. When running

, some computers always check the memory multiple times during power-on self-test, causing the startup speed to be very slow. This is caused by improper motherboard BIOS settings. You can press the Del key to enter the BIOS settings when booting, then select "Standards BIOS Setup", then find the "Quick Test" setting item, set its value to Enabled, save the settings and exit, so that when starting the self-test, only Check the memory once.

3. If it is a disk self-test:

Right-click the disk (such as C drive, it is best to repair each disk) and click the "Tools" tab under the "Properties" command , then click the "Start Checking" button and check "Automatically fix file system errors" and "Scan and attempt to recover bad sectors". Finally click the "Start" button. After the repair is completed, generally there is no need to perform a self-test of the disk next time.

Common computer motherboard fault codes. What are the meanings of computer motherboard fault codes?

1. From a series of codes (excluding "00" and "FF") to "FF" or "00", the motherboard self-test has passed, OK.

2. If "00" is output and the code does not change, the motherboard is not running. Check whether the CPU is broken, the CPU jumper, or whether the CPU settings are correct, whether the power supply is normal, whether there is mold on the motherboard battery, etc. ?

3. If you set not to prompt errors in CMOS, when encountering a non-fatal fault, the diagnostic card will not stop and continue to go back to "00". The solution is to change The CMOS is set to prompt all errors before powering on. At this time, if there is a non-fatal fault, it will stop and then troubleshoot according to the code.

The above is the detailed content of How to use a multimeter to check for computer motherboard failure?. For more information, please follow other related articles on the PHP Chinese website!