How to Test a Motherboard Without CPU in Seconds 2021

How to Test a Motherboard Without CPU in Seconds 2021

How to test a motherboard with seconds by following easy steps. The motherboard (also called the motherboard) is an integral part of the PC. This is the card that holds the processor and RAM, with which all the important components of the PC are connected. In short, the PC will not work without it and therefore it is important that it is always in good condition.

But how to check the motherboard if you have trouble understanding? In case of serious issues, you will immediately see why the PC does not start now, but there are more specific ways to check the status of the motherboard. Let’s find a couple together.

If you want to know how to check the motherboard, the first thing to do is listen to the sounds that the PC makes when booting. When you turn on the PC, the PC emits “beeps” and these beeps can tell you if there is a problem with the motherboard.

More specifically, if your computer has the American Megatrends BIOS, you need to be concerned when four or seven short beeps are emitted. In fact, this setting indicates errors in the motherboard timer or in the connection between the processor and the motherboard.

If instead, you have a PC with a Phoenix BIOS, you need to worry about the motherboard when the PC emits the same beep followed by two other series, each of which consists of two beeps (hence 1 + 2 + 2 beeps).

Another effective way to test a motherboard when you are not very good at it is to use a motherboard test card. These are screen cards that, once inserted into the PC’s ISA or PCI slot, automatically detect errors generated by the motherboard.

After detection, a card with an error code appears on the card screen, which should be explained by its instruction manual. This code accurately identifies the type of problem affecting the motherboard, and so you can proceed more clearly to find a solution. Motherboard test cards don’t cost that much when you look at sites like Amazon, you can get some good quality with prices starting at € 5.

Alternatively, if you prefer to work at the software level, you can try and find diagnostic utilities on your motherboard manufacturer’s website. To find out your computer’s motherboard model, download the free PCWizard program and get started.

Preliminary information

Before I get to the heart of this guide and tell you how to test the motherboard on a notebook or fixed PC in practice, let me give you some more information about this hardware component.

A motherboard also called a motherboard, mobo, or mainboard is a basic element of a computer: the processor, RAM, disk, and all other hardware components of the computer, such as video cards, are installed directly on it. , Network cards, and so on.

Each motherboard has integrated circuits, connectors, expansion slots, and communication buses, which dominate the transfer of data between the connected devices. In addition, the motherboard takes care of arranging the current received from the power supply between the various peripherals connected to the computer.

In other words, everything inside the computer must be connected to the motherboard in order to work: this is precise because, if it breaks, the computer may work incorrectly, or not work at all. Can’t

Given the complexity of the motherboard, it is not always easy to understand whether it works properly, as the problems encountered may be attributed to a single peri-ferrule associated with it.

The subject of this guide will, in fact, guide you to discover some analytics techniques that, with a very small margin of error, can help you understand whether the problem you are facing is the mother. Whether or not attributed to the integrity of the board.

how-to-test-a-motherboard-with-a-multimeter

How to check motherboard working or not

After creating the necessary premises, it is time to get to the heart of this guide and explain in practice whether the motherboard is working properly or not.

Separate the Peripherals.

Another practical way to verify that the motherboard is working properly is to isolate the peripherals attached to it, unless the problem is identified.

So, if you’re practical enough, disconnect the PC from the mains, open the case (or chassis, if it’s a notebook) and physically disconnect all peripherals mounted on the motherboard (power supply only, CPU, a RAM memory module, and a discrete video card, if your computer does not have an integrated chip).

When you’re done, reconnect the PC to the power supply and turn it on: if the damage has nothing to do with the motherboard or any of the connected components (CPU, RAM, or video module) The motherboard will try to get it started. System by notifying you of the absence of keyboards and/or disks at a particular point.

In this case, it is easy to guess whether the fault is due to one of the separate devices, or to the slots that contain them. To properly “separate” the cause, reconnect the previously separated pieces one at a time and turn on the computer with each addition until it stops working properly. ۔

If, on the other hand, the situation should not change, the motherboard malfunction can be detected by CPU (insufficient power supply), RAM (incorrect installation/damage to the module or bus), or video card (incorrect installation/chip or Bus Disadvantage): In this case, you should get audible feedback during the POST phase, just as I told you in the previous part of this guide.

Note: If you are unsure or if you feel that you do not have enough experience to disassemble the computer, do not hesitate to ask for help from a competent friend, acquaintance with field experience, or an expert technician. Don’t Feel: One or more incorrect actions can further damage the integrity of your computer.

Analyze the beeps.

The first aspect to consider when starting a computer is the presence of any abnormal beep: most of the motherboards available in circulation are, in fact, designed to perform self-diagnostic tests at start-up. In Jargon, the stage is called POST)) and reports internal errors by making sounds in sequence through an integrated loudspeaker.

The reason for this dynamic is easy to say: in case of error, as I mentioned above, the data may not be transmitted properly and prevent the video card from starting, thus displaying any error messages. It becomes impossible to do.

In any case, the analysis of voice POST messages is relatively simple: after turning on the computer, the power LED lights up and emits one or more “beeps”, short or long, from the internal speaker. The duration and sequence of each sound actually help to pinpoint the problem: unfortunately, I can’t tell you all the error codes that can be found, as each manufacturer uses its own.

For example, if the PC’s motherboard in question is ASUS branded, you may find the following audio codes.

  • One long beep and two short beeps – RAM memory irregularity. One or more RAM modules may be corrupted or installed incorrectly. In some cases, the RAM card slot itself may be damaged.
  • One long beep and three short beeps – video card failure, which may be low power, incorrectly installed, or damaged.
  • Five short beeps – Processor or CMOS (chip with motherboard BIOS) Unusual.
  • Status LED on, no beep – incorrect installation of CPU, RAM memory or graphics card (in this case, data transit is blocked before it can generate error codes).

Instead, here are the most popular error codes associated with Intel-branded motherboards.

  • Two beeps and shutdown – no graphics card, video card not installed or corrupted.
  • Three beeps in a row, repeat – RAM not available, not installed properly or bad.
  • Alternate high and low beeps, 8 times – CPU overheating or malfunction.

For more information on error codes used for different motherboards, I suggest you take a look at the respective manufacturers’ websites: ASUS, Intel, Gigabyte, ASRock. Alternatively, you can find more specific information through Google search, for example, using the phrase [motherboard manufacturer] beep codes as the key.

On Mac you can try to start an internal diagnostics, hold down the D key during boot and analyze any changed error codes but, perhaps, if it is the motherboard that has the problem, So you will not be able to access the computer and will be able to run the computer. Test in question.

Use a hardware system.

Another very effective way to test a motherboard is to use some hardware devices, called motherboard test cards: these are small “cards” that have a display, which is once in the motherboard’s PCI slot. Once inserted, POST errors are detected. This. Clearly, to expose the motherboard’s PCI slots, you need to separate the computer case or chassis.

Motherboard test cards can be purchased at most computer stores, specialty electronics stores, or online: here are some of them.

After the test card is installed in the appropriate input on the motherboard, turn on the computer and wait a few seconds, so that the card can detect any error. Once detected, a very short description of the error in English should appear on the test card screen, or a specific error code: both results should be easily understood thanks to the instruction manual provided with the test card. Can

How to test a motherboard before installing

Do you need to check the motherboard separately, to verify that it is working properly before reinstalling it in this case? Well, it can be done, but only under certain conditions.

To get started, the motherboard must be connected to the power supply (as a result, it must receive electricity); In addition, the processor must be present on the motherboard with its fan, at least one RAM memory module, and a video card (integrated or disconnected), otherwise error messages will be generated during the POST phase. If you are interested in testing the operation of the operating system, be sure to install the disk containing it.

To avoid installation in case, you need a power switch on the motherboard (to turn it on), a power LED (to check its status), an LED on the hard disk (if you want to check it). Will also need to be installed. Operation of disks) and internal speaker, so as to be able to interpret any malfunction “beeps”.

If you do not have these, you can buy all these ingredients in one and the same practical kit, as I am explaining below.

Once you have what you need, connect each component to the appropriate input on the motherboard (refer to its manual if necessary) and the latter to the available video outputs (HDMI, DisplayPort, or VGA). Connect to the monitor via one of, For example).

Finally, after connecting everything to the electrical network, turn on the motherboard using the pre-installed buttons and study its behavior, just like if you installed it on a PC.

Note: Due to the high-speed data transit and processor work, the motherboard and all the components connected to it can get hot. Therefore, make sure that the motherboard or its associated components do not work during or immediately after their operation, and on any non-flammable surface (such as marble or fireproof plastic surface). Do

How to test a motherboard without a processor.

If you’ve reached this point, it means that you have a good idea of ​​how to test the motherboard: on the other hand, you are curious to know if all the necessary tests are possible even in the absence of a processor. Yes, because the board of guards is the mother of your interest.

In this case, I don’t think I have any good news for you: the CPU is, in fact, the “brain” of the motherboard, the component that performs the calculations necessary to process and sort data between different peripherals.

Needless to say, if you try to turn on the motherboard without a processor, two things can happen: the motherboard may not be on at all, or it may generate an error code in the form of an acoustic beep. In both cases, the motherboard will be completely unusable and cannot be tested in any way.


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Tom Cook
By Tom Cook

Hey! It's Tom Cook, a professional Tech Writer having experience of 6+ years in the field. I have written many top-class Article which featured on so many famous websites.


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