How To Tell If Your CPU Is Dead

How To Tell If Your CPU Is Dead
How To Tell If Your CPU Is Dead

The first thing to check if your CPU is not working properly is the power. Is it plugged in? Check for a fuse or circuit breaker that may have blown. If there’s no power, then your CPU will be dead, and you’ll need to replace it.

Is your computer running slow? It could be a sign that your CPU is dead. Here’s how to tell for sure.

How To Tell If Your CPU Is Dead

I’ll give you how I tell if my CPU is dead.

Step one: Check that the computer is plugged in, OR there’s a fuse or circuit breaker that has blown. If there is no power, then your CPU will be dead, and you’ll need to replace it.

Step two: Is the computer running slow? It could mean that your CPU is dead. Here’s how to check for sure –

Open your task manager (ctrl + alt + del, then click the “task manager” tab). Next, click on “processes” Now, right-click on the process for your CPU and click “go to details” If it says it in this list as being 100% or 99%, then I would say that you do not have a dead CPU. On the other hand, if it says that your process is 0% or 1%, I would say that you do have a dead CPU.

Here Are Few Common Symptoms Of CPU Failure

The following are some of the most common symptoms of a CPU failure:

  • Your CPU does not start when you turn on the power.
  • Your computer’s fan continues to run, even after you turned off or rebooted it.
  • – 0x00000050: INACCESSIBLE_BOOT_DEVICE error message appears in the blue screen of death (BSoD) window on your computer.
  • Your CPU fails to boot the operating system (OS); in this scenario, you may hear clicking noise, as if you are trying to start a car with a bad battery.
  • Your computer keeps randomly shutting down or rebooting without any warning.
  • Blinks at 100% CPU usage all the time, but nothing is using it.
  • Screen goes black, and the computer reboots.
  • Blue screen of death (BSoD) appears on your computer; in this scenario, you may hear beeping noises, as if someone is repeatedly pressing the bell button on a school’s intercom system.
  • “Unmountable boot volume” error message appears on a black screen with white letters on it; in this scenario, 4 beeps sound repeatedly.
  • “No boot device available” error message appears on your computer’s screen; in this scenario, you may hear a single beep.
  • Your CPU: hard disk drive (HDD) lockup randomly happens, and the entire operating system is unresponsive to any command or operation that you execute on the hard disk.

When does a CPU die?

The death of a CPU can come from random bytes from the operating system, accidental static electricity discharge, hard drive failure, power outage, battery depletion or other reasons.

These scenarios are too rare to have any statistical predictions, but all will cause some temporary malfunction to the CPU. If this short term disruption occurs, again and again, it may very well be the case of a permanently failed chip. At that point, it would be recommended to get another device for constant access.

Can a dead CPU Kill a motherboard?

Processors use high amounts of electrical power to make it run. Still, there are special protections put in place so that if it does overheat and die, the voltage will be automatically shut down, and you won’t have a lot of power running freely through your motherboard.

The reason for this is due to the way computer components were built without fail-safes. Modern motherboards have protection settings that protect against such things, but computers sometimes break because they were built under old design standards with no other safeguards.

This also means that even if someone adds a new (dead) CPU into your motherboard – not likely – the only major problem is going to be overheating from too much electricity running freely through your system. This in itself would not cause any permanent damage to your power supply or the motherboard.

The CPU has a built-in temperature sensor that shuts down the computer if it’s at too hot of a temperature, so overheating shouldn’t be an issue. 

When you’re assembling/building computers, it’s important to take special care with the motherboard since it is very sensitive to static electricity and holds most of the components together in place with electrostatic charges (note this is why you need to wear an anti-static wrist strap when working on motherboards). 

However, once all the hardware is installed, there should only be below levels of electricity running through your system without any spikes or fluctuations – unless specifically boosted by aftermarket hardware such as voltage regulators or power supplies.

This means even if you have a completely dead CPU, the worst thing that will happen is your motherboard might fry and then you’ll have to replace it. 

Can a dead CPU kill or damage your CPU? The short answer to this question is yes, but only if you’re lucky.

Your main risk with adding a new (dead) CPU into your system is overspending power through your motherboard due to the way some older systems were built without fail-safes for situations like this. 

If it does somehow get damaged, it will be due to overheating from electricity not being properly distributed through the components in the right amount of wattage/current needed, leading to further damage.

Will a PC turn on with a dead CPU?

Yes, your PC still has power, even if it is missing a processor or RAM module. So, your PC will work fine if you don’t have any other serious complications to worry about. You need to hook up an external graphics card (GPU).

This can be done by opening the case of your computer tower and removing the old GPU, and then inserting one that has been purchased separately at home. Make sure there are no bent pins before installing.

What causes a dead CPU?

There are many potential reasons for the death of a computer processor, and not every problem can be diagnosed with certainty. This means that there’s usually no quick or easy answer to the question when it does happen. 

So the first thing to do is identify if your processor has died – typically displaying that by having all four lights on its square corners lit up but nothing happening on screen. 

Sometimes not all four lights will come on, which indicates an issue somewhere else in the system, with RAM, for example, rather than inside the CPU itself.

A bad power supply could cause one or more red LED’s to turn off (usually some of them) as well as preventing electricity from reaching all necessary components such as RAM and video cards. 

What is more likely to cause a dead CPU is overheating, either leading to damage after too much thermal stress or a complete cut-off from power for safety reasons. 


You can tell if your CPU is dead by checking for any of the following symptoms. If you are experiencing one or more, it’s time to call in a technician to diagnose and fix the issue as soon as possible.

I am a computer science graduate, and I love to play games. As an offline and online marketplace seller of computer hardware, I have the opportunity to help people make informed decisions about what they can use for their needs.