How To Test A Motherboard With A Multimeter? A Perfect Guide

Motherboards are a key component of all desktop and laptop computers. They serve as the foundation that everything else is built upon. As such, it’s important to ensure that your motherboard is in good working condition. One way to do this is by using a multimeter. In this article, we will show you how to test a motherboard with a multimeter and what to look for when doing so.

A multimeter can help you diagnose problems with your motherboard, and it’s not too expensive if you don’t already have one. In my experience, one of the most common causes of motherboard problems is improper maintenance. To avoid such issues, you should clean your motherboard regularly.

If you’re still experiencing issues with your motherboard after taking proper care of it, this article will hopefully be of help. Let’s take a look at what kind of problems your motherboard might be having, or how to test a motherboard using a multimeter.

Let’s CheckOut Different Ways To Test a Motherboard With a Multimeter:

There are two easy ways to test a motherboard with a multimeter. The first is to test the voltage regulator module, and the second is to test the power supply.

Short Circuit Can Be The Reason:

We’ll start with Short Circuit because it’s one of the most prevalent motherboard problems.

We have listed a step-by-step guide below to help you understand each step!

 1-  Turn down your computer’s power entirely, then disconnect all of the power cords and switches that are attached to it.

2- Before taking measurements with your multimeter, it is important to properly calibrate it. To do this, set the multimeter to the lowest setting (usually 200 Ohms). 3- Next, touch both of the leads simultaneously and hold them until the metre reads zero. 

4– Finally, check the calibration by touching the leads to the chassis. If the multimeter reads zero, it is properly calibrated and ready to use.

5- To find the motherboard, start by taking your computer apart. Once you have access to the inner components, locate the ATX connection and remove it from the motherboard.

6- The red wire connects the AC ground pin on the PSU to the chassis, while the black lead connects the DC ground to the PSU. All of the measurements should be 0 at this time.

7- It is important to keep the black lead in place while checking the colored wires with the red information. A total of 50 or more is normal, but if it is less than 50, you should be concerned.

If you’re not satisfied with the previous approaches, you can try out different strategies to find weaknesses.

To remove the motherboard from your computer, first locate the PINs on the motherboard using the ATX 20-pin chart. Then, use the red lead to test each of the GND PINs. Three, five, seven, thirteen, fifteen, sixteen, and seventeen must all be zero. If you notice any other reading, there is a problem.

For DC voltage:

To check if the DC voltages are different, follow these steps:

Step No 1- Make sure the 20-pin ATX connector is connected, then switch on the computer.

Step No. 2: Please set your multimeter to 20V DC.

Step No. 3: Now use the black multimeter test to check the backside of the connection, making sure that the black test is in contact with pins 15, 16, or 17.

Step No. 4: When testing with a 9 and 14 combination, PIN 9 should be set to 5V and PIN 14 should be 3 to 5V.

Step No. 5: Once you’ve switched on the computer, check to see if the measurements are decreasing to zero. If not, there may be some issues that need to be addressed.

Step No. 6: You will need to retake the red test. Check pin 8; the voltage should be at least 2.5 volts.

Step No. 7: Press the reset button to see if the reading drops to zero and then rises again. If it does not, don’t worry. 

A trained specialist can help you with this issue and can be easily found for a few dollars in your area.

Consider Checking Short/Open Circuits in the Power Supply and Motherboard:

If you suspect that there may be a short or open circuit in your power supply or motherboard, there are a few ways you can check for this. 

1 – Start with the power supply. Unplug all of the cables from the motherboard and plug them back in, making sure that each one is firmly seated. Check the 24-pin power connector and the 4/8-pin CPU power connector to make sure that they are plugged in correctly.

2- Connect the multimeter probes to the power connector. The black probe goes to any of the ground pins (usually marked with a black or white stripe), and the red probe goes to any of the +12V, +5V, or +3.3V pins.

3- .Set the multimeter to the resistance (ohms) setting.

4- Check the voltage at the outlet using a voltmeter. If the reading is below 110 volts, then there is probably a problem with the power supply. 

5- Next, check the voltage on the motherboard using a voltmeter. If the reading is below 5 volts, then there is probably a problem with the motherboard. 

6- Finally, check the current on the motherboard using an ammeter. If the reading is below 1 amp, then there is probably a problem with the motherboard. 

To Sum Up:

Testing a motherboard with a multimeter may seem like a daunting task, but with these simple and easy-to-follow instructions, you’ll be a pro in no time! Just be patient and take your time while doing so, and you’ll be sure to get accurate results. If you found this article helpful, let us know in the comments section below. Thank you for reading.


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Team AllTechBuilds
By Team AllTechBuilds

We are a group of tech-savvy people who love helping others find the best technology products for their needs. We take pride in providing in-depth, unbiased motherboard reviews and buying guides to help people make the best choices for their needs. Whether you're a gamer, a content creator, or just need a reliable PC, we can help you find the right motherboard for your build.


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