How to tell if CPU is dead?

If your computer’s central processing unit (CPU) is harmed or a chip fails, the system will not boot. The laptop might switch on, but the monitor would show nothing. The PC will stay on Power on self-test with a working central processing unit. It’s important to note that there are several alternative reasons for this.

Therefore, when you change the CPU, we propose that you undertake the necessary actions to help us understand How to tell if the CPU is dead. Realizing if the CPU is dying before upgrading it will also prevent you from spending significantly on a new CPU chip. Here, we discuss how to tell if the CPU is dead.

Table of Contents

How do you tell if the CPU is dead or Motherboard?

Computer processors don’t often fail to function. Some of the primary triggers of a dead CPU are broken wires and mechanical damage. If the CPU’s pins are not broken, and there is no evidence of physical harm, you should still check the rest of the system without writing it off as dead. It could also be like that. How to tell if the Processor is slow?

While the above sign may lead you to believe that your CPU is dead or a mother is, you may check a few other things to ensure the motherboard is the central part of a computer, linking all the different parts collectively.

If your computer is suddenly stopping, failing to recognize connected hardware, or failing to load, there may be a variety of possible causes. The motherboard is just one potential source of the problem. You may observe specific symptoms if your motherboard is faulty or poorly designed.

For example, if your PC often stalls and slows, and there appears to be no other reason, it may be due to an incorrect motherboard adjustment. However, a hardware problem with the motherboard could be to blame if your computer does not even start up after being plugged into its electrical supply.

Everyday Things That Might Indicate a Dead CPU

Intel CPU

When the central processing unit (CPU) fails, the computer will boot, and the blades spin, but the display will show nothing. It is feasible that the desktop will not power on at all.

POST Test:

The Power on self-test (POST) is performed when you turn on a computer. This test proves that the system has found all the required equipment. The central processing unit, random-access memory, graphics processing unit, and a few input/output modules are all part of this.

It will disrupt the CPU-GPU link if the central processing unit fails. As a result, the system will work without a display. Although the system will be operational and the blades will turn, there will be no visual output.

Inserting a POST card into your motherboard’s connectivity options is another option. It will show an issue number on the POST card. When you enter this code into a computer, you’ll know if the CPU is broken or completely other.

Check for Bent Pins:

CPU bent Pins

Central processing unit transistors typically do not decay with use. Modern operating systems and software use can cause them to become increasingly faster. Only severely bent pins should be a problem for the CPU.

Removing the central processing unit from the board allows you to inspect it for bent connections. Each of the pegs must be perpendicular to the others. Yet, specific processors may not include motherboard-connecting ports.

Pins are not needed for the Intel manufacturing process. If you utilize an Intel chip, your motherboard’s CPU socket may have twisted pins. On the other hand, if you use an AMD processor, the CPU pins may be bent.

Check Fans RPM:

Whenever a computer boots up, the BIOS on the motherboard decides the settings for the Processor and the casing fans. The laptop cannot go past the POST if it does not recognise a processor. So, if the CPU dies, its fans will spin as fast as possible.

So, if the computer is noisy, it’s likely because the motherboard fails to recognize the central processing unit.

Replace CMOS Battery:

The CMOS stores data about the time, the boot drive, and other attached hardware. When the computer turns off, the CMOS battery keeps the CMOS chip powered to save all data.

Failure to start the computer can occur if the CMOS battery dies. Switch out the CMOS batteries and see if the laptop typically starts up.

Re-Insert the Power Supply:

The power supply unit may be at fault if the motherboard cannot identify the CPU. The power cable connects the power supply unit (PSU8-pin ) to the motherboard. The central processing unit power supply is through this connector. The motherboard may fail to recognize the CPU, or problems may arise if the 8-pin cable is broken. To see if your computer passes the POST, you should reattach this cable and turn it on.

It’s also possible that the power supply (PSU) is not delivering adequate Power to the motherboard, which would explain why it’s not working. You could try switching out the power supply to see if it helps. A second test is to see whether the motherboard should do the CPU if the first fails.

Remove and Reconnect All Wires:

Your computer’s bizarre behaviour could be the consequence of incorrect internal wiring. If the CPU fan’s cables aren’t attached correctly, the fan can’t just turn. Because of this, the central processing unit will be subjected to high temperatures. As a result, the computer will shut down abruptly. Additionally, power supply lines must be fastened. Try detaching and restoring all cables to see if the system recognizes the CPU.

Check the CPU in another Motherboard:

If all else has worked, try replacing the current CPU with one from a different configuration. If the computer boots, the original motherboard is probably damaged. If the replacement program still won’t boot, it’s probably because the central processing unit has failed.

Can I Run a PC Without a CPU?

With the need for a properly operating central processing unit, the PC will succeed in the POST. Since the GPU requires the CPU for connection, you won’t be able to see anything on your screen if the CPU is not functioning.

The computer may boot up, and the system and case blades might or might not turn, but the screen will remain blank.

Partial Process of Elimination

By isolating the power source, central processing unit, power supply, and case speaker from the motherboard, you can cut down the list of possible causes. Please turn on your computer and give it a try. Long sounds indicate that everything is operating as it should. The motherboard is beeping since there is no RAM installed.

The CPU, power supply, or motherboard may be defective without beeps. If you’re experiencing multiple issues, your CPU is likely toast and needs to be replaced.


If your computer fails the POST after you’ve done everything we have advised, it may be due to a dead CPU. Now, the problem of How to tell if the CPU is dead is resolved.

Unless a pin is bent or a scorch mark on the CPU, it will not likely stop functioning perfectly and must be changed before the computer can start. Please don’t rush into changing the central processing unit unless you’re optimistic it’s dead.

Frequently Asked Questions

What if My CPU Wasn’t the Problem?

If you’ve run these tests and discovered that your CPU is good, you’ll have to do more diagnostics on your computer or contact your motherboard maker. 

To learn the significance of the beep you heard while checking the CPU, you should contact the motherboard manufacturer and describe the sounds you heard. From such a point on, fixing issues is much simpler; it can avoid any possible harm thanks to a specialist’s guidance.

What Causes a CPU to Die?

Getting too hot and electrostatic discharge are the two most common causes of CPU mortality. Overheating often takes a while to occur. However, ESD can instantly destroy your CPU.

The central processing unit (CPU) can also fail if you subject your laptop to extreme heat, humidity, or physical force. It is the rare outcome possible, as it usually allows the CPU to become detached instead of dying. However, ejecting can result in a different issue altogether: bent pins.

How do I Revive a Dead CPU?

If you are a sentient robot trying to avoid being discovered by Blade Runner, even if you get the Processor to work on fewer cores, you might be unable to fix it if the problem is with a vital part of the chip. Getting in touch with the maker to determine if the CPU is still covered by insurance is best to do.

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