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Why Does My Computer Keep Blowing a Fuse?

Computer Keeps Blowing Fuse

Why Does My Computer Keep Blowing a Fuse?

The main reasons for a computer to keep blowing a fuse is using a damaged or incorrect power cord, a fault in the PSU, or fluctuations in the power supply.

Below are some of the major causes of a computer that blows a fuse:

  • Faulty or incorrect power cord: There are times when a faulty power cord is used to establish a connection. In such a case, the computer blows a fuse because the connection is not established properly. In addition to this reason, a power cord that is not suitable for a particular system model is used. This is also one of the major reasons why a fuse blows off.
  • Fault in the Power Supply Unit (PSU): The PSU is generally located behind the computer system. This unit is extremely essential for the smooth functioning of a system. Generally, if there is a problem with a blown fuse, faults are found in the Power Supply Unit. If there is a disruption in this unit, the computer system blows a fuse and shuts down automatically.
  • Fluctuating power supply: Sometimes, the computer system does not receive enough power supply as required for functioning. Therefore, due to less or a varying power supply, the computer blows a fuse.

A blown fuse is one of the major causes of computer shut down. A computer can keep blowing fuses for various reasons. This problem can arise anytime during the lifetime of a computer.

Faulty hardware components are responsible for a computer continually blowing fuses.

However, it is important to understand the system specifications to get rid of this problem.

A fuse also blows when the Power Supply Unit (PSU) is connected directly to the outlet without any protection.

In addition to the causes mentioned above, there might be other technical causes or faults that are not identifiable. In this case, it is important to contact a system engineer to solve the problem.


Why PC keeps blowing the power supply

A PC can keep blowing the power supply because the power supply is overheating or due to connecting the PSU directly to the power outlet.

Power supply or electricity plays a vital role in the functioning of a computer system. The system has to receive enough power supply to transports the supply to other components of the system as and when required.

However, there are times when a computer system keeps blowing the power supply. It is important to find an effective solution for this problem as and when it occurs.

One major recommendation to prevent this problem from occurring is to get a suitable Power Supply Unit (PSU). A good-quality PSU unit will keep functioning for a long time without any technical errors.


Below are some of the major reasons why a PC keeps blowing the power supply:

  • Excessive heating: There are times when a PC faces excessive heating problems due to the amount of power supply received. In this case, the PC tends to shut down automatically to avoid severe damage. Frequent crashes of the screen are also experienced when the power supply is blown.
  • Absence of a surge protector: The power outlet initially has a large amount of power supply, which might be harmful to a PC. Therefore, it is important to avoid connecting the PSU directly to the power outlet. Instead, it is recommended to use a surge protector or any other protective component to connect the PSU to the power outlet. In this way, the problem of blowing the power supply can be avoided.

If the problem persists, it is important to check the functionality of the internal hardware components such as the motherboard.

The person trying to overcome this problem should have some basic knowledge about the internal hardware components present inside the computer case.

Knowledge about the various cables and connections should also be possessed to avoid confusion while assembling the components.

Switch off the PC and open the internal part of it. Remove all the dust particles and dirt. Check if the components are connected. Examine if there are any faulty wires to be replaced.


How to test a PC power supply

It is important to test a PC power supply if there is a problem of fusing blowing or frequent shutdowns. However, in addition to frequent shutdowns, there are many other problems faced by a PC if the power supply is improper.

Given below are some of the problems which occur due to a bad power supply:

  • Unnecessary noise is heard from the PC regularly.
  • The internal hardware components do not function smoothly.
  • The fan keeps spinning, but there is a problem while restarting the PC.
  • The monitor screen suddenly crashes, resulting in a computer shutdown.

The problems mentioned above are clear signs of a poor power supply. If an effective solution is not found, these problems might cause severe damage. Therefore, it is always necessary to test the PC power supply before taking any action.

Here are some steps that can be performed to detect whether a PC is suffering from a poor power supply or not:

  1. First, connect the power supply to the outlet wall.
  2. Look for a 24-pin connector that is suitable for the motherboard.
  3. Find the green wire and carefully connect it to the red wire.
  4. When this is done, the power supply’s fan should start spinning. Then, the motherboard should be monitored.
  5. If this does not happen, then there is a problem with the power supply.

For detailed testing, a multimeter can be used to measure the power supply. All the steps mentioned above should be performed carefully because it might be dangerous. Any type of carelessness can cause severe damage.

It is better to get the help of an experienced person to get this job done. If the problem persists, or the steps are not clear, you should get in touch with a system engineer for guidance and advice.


How to stop a laptop from blowing fuses?

Laptops offer extended functionality compared to computers. However, the different problems you can encounter in the functionality of both the devices are almost similar.

Like computer systems or PC’s, laptops also encounter the problem of blowing fuses. When this problem occurs, the laptop’s performance reduces, and it is extremely hard to power up the laptop.

If there is a blown fuse, then the causes are the same as a PC. The causes have been listed in the previous sections.

It is important to replace certain components since they might be faulty enough to cause this problem. First, consider getting a new fuse with the same voltage and ratings as the previous one.

To eliminate the problem of blowing fuses permanently, it is recommended to replace the battery with a new one.

However, if there is no clarity in any of the solutions mentioned above, it is better to contact a technician or the laptop brand’s support team to provide further guidance.


How to fix a blown fuse on the computer?

A computer often encounters the situation of a blown fuse for various reasons. However, this problem is hugely troublesome, as it reduces the computer’s overall functionality.

The most common causes for this problem to occur have been discussed in the first section. It is important first to identify the cause and then take the necessary action.

Given below are some effective solutions that can be applied to get rid of this problem:

  • Remove the power cord.
  • Look inside the computer case.
  • Remove all the cables from the internal hardware components, including the motherboard.
  • Additional power cards (if any) should also be removed as their presence might be affecting the power supply.
  • Remove the screws that keep the power supply fixed in the case.
  • Examine the unit properly and check for the warranty.

An important point to be noted here is that dealing with a power supply is not an easy task and can be dangerous if the person is careless.

Therefore, assigning this work to a person who possesses basic technical knowledge or has some experience working with wires and cables is suggested.

If the problem is not solved, it is better to contact a technician for further guidance.


HP laptop blown fuse in the battery

HP is one of the most trustworthy brands for good-quality laptops offering high performance. But the problem of a blown fuse is encountered with these laptops as well.

The causes of blown fuse may be different in different machines.

When there is a problem of a blown fuse in the laptop battery, charging the laptop becomes tedious, and the performance also reduces.

Therefore, it is important to discover an effective solution for this problem to avoid serious damage.

Let us discuss the methods useful to solve this problem. Generally, when there is a blown fuse in the battery, an error message is shown.

The error message consists of a unique failure ID displayed on the screen. The message on the screen tells the user that Fuse 42 is blown off. If you encounter such a message, you should contact the HP support team for further action.

The expected solution for this problem would be to replace the faulty battery or to repair the existing one. However, the solution completely depends upon the severity of the problem.

Generally, when Fuse 42 is blown off, a piece of general advice is to replace the entire battery to get rid of the problem forever. If the existing battery is repaired, there are chances of encountering this problem regularly.

Ernie Lo

Ernie Lo is a qualified web designer and web developer. He works as an IT support technician and website manager at Benleigh Vending, and he also fixes vending machines.

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