How to Check Laptop Power Adapter Without Multimeter? Easy Guide

The issue is much more widespread than you probably think it is. Can you think of the charger for your laptop as the device’s source of oxygen? Without it, you would be unable to continue the activities that make up your daily routine. 

On the other hand, a fault in either the laptop’s charging capabilities or the charger itself can frequently be attributed to carelessness or accidents.

Do you want to know How to Check Laptop Power Adapter Without Multimeter? If this is the case and you discover that your laptop charger is not functioning in any way, this article will help you discuss the most effective solution available.

Typical Causes of a Defective or Malfunctioning Laptop Charger

When you attach the charger to your laptop, you will hear a beeping sound, and a dedicated LED integrated into the computer will light up. It will happen immediately after you connect the charger. What should you do if it does not occur and you discover that your laptop is not charging even after you have plugged it in?

Your worries may be based on several different things, including the following:

1- There is an issue with the power input of your PC.

2- Both the battery and the charger are somewhat outdated.

3- The driver for the batteries has seen better days.

4- It’s possible that your laptop is not getting enough power because of a defective adapter cord.

How to Check Laptop Power Adapter Without Multimeter?

How to check Lenovo laptop charger is working or not

This section contains the necessary actions. In most cases, however, the pin within your charging connector is bent or damaged. It may contribute to charging troubles. Straighten the nail using a little screwdriver if you discover it is bent. Then connect your laptop’s charger to your computer.

If your laptop is still not charging, please follow these steps. There are no risks associated with testing your laptop charger with a multimeter, but you could electrocute yourself, your family, or others.

If you lack confidence in your ability to do these tests, please see a professional electrician. One is always available. This procedure will use a digital multimeter to evaluate your laptop’s power supply. Obtain a digital multimeter with auto-ranging functionality.

The charger for your laptop consists of two components: the main plug that plugs into the main socket and two pins. The second component is the adapter that plugs into your computer.


Now, verify the adapter’s voltage. We will utilize a 19-volt adaptor in this instance, but yours may be different. It transforms the 240 volts of AC (alternating current) from the wall outlet into the 19 volts of DC (direct current) that your laptop requires.


To test your adapter, verify it is fully plugged into the outlet and then turn it on. Then, insert the pin.


Ensure that your leads are correctly connected. The black wire is inserted into the COM port, while the red wire is inserted into the VHz symbols. If you are uncertain, please reference your manual.


Grab your detectors; remember, black means negative, and red means positive. Verify once more that your laptop’s power adapter is hooked into an outlet. The next step is to power your meter and adjust the dial to the DC volts setting.


Have the red positive conductor ready, and carefully slide it into the adapter pin until it reaches the tip. Take out your black negative probe now. Position it so that it protrudes slightly beyond the edge.


By looking at the volt reading on your multimeter, you can ensure that your laptop charger is functioning correctly.

Important Points:

It is supreme to remember that the output voltage chosen by your laptop charger will affect the voltage readings on your multimeter. As a result, you should initially compare the AC adapter’s voltage levels to the results from the multimeter.

Video Guide:

How to Check whether Lenovo Laptop Charger is Working or Not?

If the charger for your laptop suddenly stops working, you could find yourself in a challenging situation. The problem isn’t exactly rare, but the fact that it keeps occurring is frustrating. But if the charger for your Lenovo laptop won’t charge, what options do you have?

A malfunctioning AC adapter is yet another reason why the charger for your Lenovo laptop won’t work. If you have more than one AC adaptor, you should try using one of those instead. If you can resolve the issue, this demonstrates that the AC adapter was the source of the problem.

If the charger can still not charge the device, the problem is likely with the charging cable; in this case, you will need to acquire a new charger. However, before you go out and buy a new charger, you should first see if you have another charging cord that you may use to test the device. 

It will assist guarantee that the charging cord, and not something with the laptop itself, is the actual cause of the problem. If a computer doesn’t see the charger, it can’t get its battery charged. In addition, it can’t use electricity directly instead of the storm. After your battery dies, your laptop will be useless until the issue is resolved.

The failure to recognize a Lenovo laptop power supply is typically due to an obsolete battery driver. Download the latest version of your laptop’s battery driver from Lenovo’s website. The latest driver should be downloaded, then installed, and finally activated.

A new charger should be tried if a charge is still not recognized after updating the battery driver. Forget about charging that Lenovo laptop battery when the adapter is dead or broken.

How to Test a Dc Power Adapter With a Multimeter?

Plug-in power supplies are a common sight, and they tend to accumulate quickly. For your computer, smartphone, or music player to function, it needs a specialized adapter. Problems with AC adapters might be caused by loose connections, faulty wiring, or other electrical issues. 

Before you try to test your AC adapter:

  • Make sure you have a firm grasp of the fundamentals of electricity.
  • Know how to work safely around electricity.
  • Have experience using a voltmeter.

The health of your AC adapter-powered devices depends on regular testing.


The adapter must be unplugged from both ends. If the cable or adapter appears to have been damaged, such as frayed ends or a damaged plug, you should have it professionally repaired. 

Important Point: If your adapter is physically damaged, you should get it fixed or get rid of it because it poses an electrical shock risk.


Look for soot, scorch marks, or a distorted or molten housing to determine if it overheated the adapter. If the adapter shows signs of damage from overheating or mishandling, you should toss it.


Plug the voltmeter into the wall socket that supplies power to the adaptor. Check to see whether the adapter receives sufficient power from the wall outlet. Indicating a faulty adapter when an outlet is linked to a switch or switched circuit is possible. Make that the adapter’s grounded or polarized outlet is compatible with it.


Before testing:

  1. By reading the label, you know the adapter’s input and output voltages.
  2. Place the voltmeter’s dial appropriately to read the adapter’s output voltage.
  3. Plug in the AC adapter and turn off the power strip.


It would help if you connected the voltmeter’s leads to the adaptor. Activate the voltmeter, as well as the power strip. If the adapter has a switch, you should turn it on before using it.


The voltage output by the AC adapter can be determined by reading the voltmeter. If the voltage displayed on the voltmeter does not coincide with the rating written down, you Should throw the adapter.

FAQs – How to Check Laptop Power Adapter Without Multimeter?

Which Wire is Positive on a DC Adapter?

When it comes to DC electronics, the generally accepted wiring convention states that the positive voltage is carried by the red wire, while the black wire serves as the circuit ground. In most cases, red is denoted as a “plus” sign (), while black is represented as a “minus” sign (minus).

How Do I Notice if My Lenovo Laptop is Charging?

If the battery’s charge level is below 5 percent, it is either charged or about to be arrested. The orange light that flashes slowly means that the battery is being charged. 

When the charge level reaches twenty percent, the color of the blinking light will change to green. Green light with a slow blinking pattern indicates that the battery charge level is between 20 and 80 percent, and charging is still taking place.

How Do I Know If My Power Cord is Working?

Set the resistance multiplier on your multimeter to 1. The ohmmeter reading should be zero if the cord is good to go. The line should remain watertight even if bent and stretched to its maximum length. Wildly fluctuating readings on the multimeter indicate a faulty power cord that needs to be replaced.


Now, you know all about How to Check Laptop Power Adapter Without Multimeter?  If you are confused, you can ask me through the comment box. I will answer you as shortly as possible. Thank you for visiting our site.

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