How To Test Motherboard With Multimeter

How to test motherboard with multimeter?

How to test motherboard with multimeter? – Motherboards are built from many different components. You need to install a motherboard in order for your rig to run and everybody wants to know how to test a motherboard with a multimeter.

If the main board of your PC stops working or isn’t working as it was in the past, you may get some issues. If you have a faulty motherboard, it will probably make a lot of errors in your computer. A failing motherboard should be taken to the repair shop immediately. It’s time to take your computer to the repair shop and have it checked out.

How to test motherboard with multimeter-DC Voltage

How to test motherboard with multimeter-DC Voltage

Here are details about a failing motherboard and its symptoms. If your motherboard is problematic, it needs to be checked out with a multimeter to dig deeper.

A multimeter is a very good way to check the simple problems of your motherboard. It will even tell you if your motherboard is faulty, which would be something else to add to your collection of horror stories!

If you have a multimeter, then you can detect the electronic issues of the motherboard easily through a multimeter.

Shortcircuit test for motherboard

Shortcircuit test for motherboard

How to Test a Motherboard With a Multimeter?

For short circuits:

When there is a surge of electricity, we will talk about testing for motherboard short circuits first, because it is a common problem and may switch the computer off.

Short Circuit Motherboard

Short Circuit Motherboard

First Step:
It’s a good idea to switch your computer for a while and leave it for at least 10 minutes before.
The remaining charges in the PC will be drained by the rest. Take your multimeter and set the multimeter to the lowest ohm setting of 200 ohms, and connect both probes to each end of the resistor by testing. Connect the two probes to the PC completely. The reading on the meter should stay the same.

200 ohm multimeter

200 ohm multimeter

Second Step:
If you want to move up to a faster processor, then lead to the next step that is to take out the 21-pin ATX connector from your motherboard.
A black probe should stay on the chassis, while a red probe should be used to check the DC connector’s black wires and the power supply unit  AC connector’s ground pin. There should be no reading during that process.

Third step:
To make sure the DC connector has been properly wired, look for the colored wire. It should be connected to the black lead stays one. The colored cables should give a reading of 50 volts or higher.

Fourth Step:
After that remove the CPU from the motherboard you’ll have to open the case for setting.
Before the CPU is removed, use the black probe on the chassis’ ground pin, and use the red one to Probe pins 3, 5, 7, 13, 15, 16, and 17 using the meter’s red lead.

The reading should be 0 and stays 0 if the connector is correct. There are other indications of a weak connector.

For DC voltages:

The steps to check DC voltages are slightly different.
First Step:
Set your multimeter to 20 volts DC and plug the 20-pin ATX connector into your motherboard. It seems to be an ideally daunting process. Then, connect the computer to an AC power supply unit.

Examine the connector’s backside with the meter’s black probe on the chassis and then set the black probe with 16 or 17 pins of the connector.

Second Step:
Check the 9 and 14 pins of the meter and see if they’re in the red or green position. When you check your pins while looking at the readers, make sure to look at them from time to time. When pin 9 is on, turn on the light.
If the light flashes red and the fine issues red, you can assume that it’s not charging correctly.

If the reading is between 3 to 5 volts, then there is no problem; otherwise, the faulty switch may be the cause. You should check the state of the power supply unit by probing the pin 14 to make sure it’s turned on and off.

Third Step:
You should be able to check if Power is OK by probe pin 8 with the red lead. If it’s OK, probe pin 10.This test checks if the computer’s fan, power supply, memory, hard drives, and keyboard are in good working order.

Press Reset and check the meter and check motherboard; it should drop to zero and then climb up while the computer restarts. Then remove the multimeter after you check motherboard.


You can measure the power supply voltage using a voltmeter and test if there are any voltage changes and short circuits. Make sure to test thoroughly. If you don’t have adequate safety parameters in place, you could be at risk