Laptop USB Port Electric Shock | Causes And Solution

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Some of us have been shocked by our laptops, or worse, experienced a tingling feeling caused by Laptop USB Port Electric Shock. Continue reading know about it.

Laptop USB Port Electric Shock

This usually happens when your laptop is plugged in, and the shell is made of metal. You can even get a shock by touching the charger’s tip. If you find yourself in this situation, there is a straightforward solution. But first, let’s look at what might be causing the problem in the first place.

Causes For Laptop USB Port Electric Shock

Why Does Your Laptop’s USB Port Shock You?

Current Leakage: When current escapes from its designated circuit or crosses the boundary imposed by insulation, it is called current leakage. In other words, an exposed wire in your laptop could come into contact with the case, causing you to get shocked. Your laptop must have a metallic casing, and the adapter must be unearthed, as explained in the next segment.

Socket wiring issues: There are times when the socket you plug into is not correctly grounded or earthed. Your sockets normally have three holes: the one on the right is the hot one, from which electric current flows through whatever you plug into it before exiting via the one on the left (neutral).

The top/bottom hole is connected to the ground and serves as a balance by providing an alternate exit, which in this example, would take the current from your laptop’s steel cover. To be sure, a tester should only light up when it is inserted into the correct hole. If it lights up when you place it in the left hole or the top one, there is a problem with that socket.

Faulty AC Adapter: Your laptop’s power adapter could be one of the reasons you’re experiencing an electrical shock. There could be exposed insulation, or you’ve been using it for a long time, and it’s just asking you to replace it, pun intended.

How To Fix Laptop USB Port Electric Shock?

Almost certainly, the laptop’s earthing circuit is defective. As a result, rather than being grounded, the residual charge on the laptop’s metal body remains on the body, causing a slight shock when touched.

Given that the connector is three-pronged, I recommend that you examine the earthing circuit. Link the wire terminals of an incandescent bulb, one in the phase line and the other on the earthing line (instead of the neutral line), and verify if the light shines properly. If the bulb is fully illuminated, the earthing circuit is closed (but this is not always the case). However, you should call an electrician.

Try The Following Solutions

Get a three-prong power adapter: Some AC adaptors, like your socket, are earthed, which is what the third prong is for. This gives an extra layer of protection by removing any stray current that could shock you or cause damage.

Before connecting accessories, unplug your laptop: This is more of a preventative measure than a solution. Anyway, if you wish to connect something to your computer while plugging in, you need to unplug it first.

Obtain a new battery: Obtaining a new battery is another simple technique to eliminate electric shock from your laptop. When you touch the metal component of the case, a damaged battery can cause a problem in your laptop’s circuitry, resulting in an electrical shock.

The frame should be connected to the ground pin on the sockets via the charger, but if this isn’t done correctly, there could be a potential difference between you and your laptop, which you’ll feel as little power shocks. See if connecting the charger to a grounded outlet makes a difference.

If there are no shocks and the chargers ground the frame properly with grounded sockets, it’s working as it should (and you should always use grounded sockets), but if there are still shocks, return the charger and buy one from the laptop’s manufacturer. I know they’re pricey, but there’s a chance you’ll be less likely to a) get shocked all the time and b) have your laptop ruined by a careless stray touch to the wrong spot.

Can You Get An Electric Shock From A USB Cable?

If the connection is well-designed, it will deliver a large current to a low-resistance item. You, on the other hand, are not a low-resistance device. You’re a device with a lot of resistance. Unless there is a lot of force behind it, all that current slows down when it encounters a high-resistance device.

Electromotive force, or emf for short, is the name given to this force. The force under which electricity travels is measured in units called “volts,” It is measurable. To keep electricity flowing at five amps through you, you’ll need a lot of volts. (In fact, 1 amp across your heart might be enough.) Twenty volts is far insufficient.

The especially DC of 20 volts. AC does a better job of killing you and requires less voltage, but you’ll need closer to 100 volts to kill you unless you’re sitting in a tub of water or have probes beneath your skin. No matter what, the power in a USB-C connection isn’t enough. So go ahead and charge your phone quickly and smile.

Why Does My Laptop’s Cover Frequently Give Me An Electric Shock?

There are various reasons why a laptop case could cause an electric shock, as other commenters have pointed out. However, I’d want to offer a cure for a certain form of shock that occurs frequently.

I’m currently using a Microsoft Surface Book 2, and the approach described here is appropriate. It could apply to a wide range of laptops with metal cases. First, let’s take a closer look at the situation we’re dealing with to see if this answer is appropriate.

  1. Are you using a metal-cased laptop?
  2. Is the tingling a constant, acute, and uncomfortable sensation when the inside of your wrist meets the laptop’s edge or corner? (In other words, it’s not a CRACK! type of shock with a spark.)
  3. Is the problem resolved when the mains adaptor is removed?
  4. Is the mains adaptor a two-pin connection (rather than a three-pin connection) to the mains power outlet?

If you answered yes to these questions, the solution could be surprisingly simple. If you’re knowledgeable about electrical circuits, you may find it difficult to think this will work at first. Unplug the power supply unit’s mains cord, turn it over, and reconnect it.

The cause is unknown, although there is a high-frequency voltage between the case and the earth when the problem arises. This may be around 500 MHz and 60 volts. I’m not sure why a signal like this would be in the body of the case, but it is. Your body connects the laptop casing to the earth and completes a circuit when your moist skin contacts it.

The generated current is strong enough to be felt at the point of connection on a sensitive area of skin like the inside of your wrist. The pins on the main cable are not interchangeable. At your local electrical substation, one is connected to the earth. The other delivers AC power at your local standard voltage, usually 110–240V.

This indicates that one wire can safely connect the casing to the ground while the other cannot. Your case will either be earthed or not, depending on which side you enter the cable. I’m not sure why device manufacturers don’t make sure the cable can only be used in one direction.

Why Does My Laptop Shock Me When It’s Plugged In But Not When It’s Not?

There could be a couple of difficulties with your laptop if you get an electric shock when you connect it. If you only checked the sockets in one location (say, at home or work), there’s a potential that the earthing provided to that area or building is faulty. So double-check your building’s earthing.

If your laptop gives you a shock every time you plug it in, there’s a chance your motherboard will be damaged due to a condition where “when the charger is attached; it oppositely draws a current as well.” Replace your charger and see what happens. But, most crucially, inspect the building’s earthing. It may be faulty. I hope I was correct.

Why Do We Receive Shocks While Charging The Laptop?

Because the socket you’re using isn’t properly connected to the ground wire, the extra current stays in your laptop only while you’re charging it; the metal parts in your computer are all internally connected, likely to result in current; and as you touch it, the electric current finds a way of reaching the ground through you, and you get a shock.

Electric Shock From The Laptop While Charging

If a laptop has a metal casing and is also charging, you could occasionally feel slightly tingling when touching the device. This is due to leftover current from the laptop’s body flowing towards the “ground,” which is a body of negative electric potential.

Can USB Cause Electric Shock?

Yes. A phone charger has the potential to electrocute a child. Children also risk suffering burn injuries and electrical shock from chargers. Because most people would never think of a charger to offer such a lethal and hazardous threat to children’s safety, these nightmare scenarios worry parents.

Can The Laptop Give Electric Shocks When Charging?

Occasionally, touching a laptop with a metal chassis can cause a little tingling sensation while charging. This happens because the computer has a residual current flowing through its body that eventually reaches a body with a negative electric potential, known as the ground.


The Laptop USB Port Electric Shock we’re talking about isn’t fatal, and it might not even be noticeable; it could feel like a tingling sensation. Appropriate earthing in the socket or charger can usually fix half of the problem in both circumstances.

Frequently Asked Questions

When my laptop is plugged in, why does it send electric shocks through the ports?

Your computer case isn’t correctly grounded, as it should be via the ground pin on your power supply. This is usually caused by a faulty power cord, extension, or site wiring, and it can result in a shock or electrocution.

Is it possible to be surprised by a USB port?

The source of the shock is most likely the wall adapter that was plugged into the laptop. Unplug the device and touch the USB cable to confirm this. The astonishment should fade.

Is it possible to get a shock from your laptop?

Current leakage occurs when the current escapes from its designated circuit or passes an insulating border. To put it another way, an exposed wire in your laptop could contact the casing, causing you to get shocked.

How do I stop my computer from giving me electric shocks?

Plug the equipment’s power wires into grounded electrical outlets to avoid electric shock. Use adapter plugs that skip the grounding feature, or delete the grounding feature from the plug or adapter if the equipment comes with a 3-prong power cable.

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