Start with the simplest cause first
A laptop that won't charge usually fails at one of three points: the power outlet itself, the cable and connector, or the battery and charging circuit inside the machine. Most of the time it is the cable or outlet, not the laptop. Before you assume the hardware inside is broken, test whether power is actually reaching the connector.
Plug something else into the same outlet — a phone charger, a lamp, anything with a plug. If that device powers on or charges, the outlet works and the problem is in your charging cable or laptop. If nothing works from that outlet, try a different outlet in another room. Outlets fail, and a dead outlet looks identical to a broken charger from across the room.
Key Takeaways
- Test the power outlet first by plugging in a different device, because a dead outlet is the most common cause and the easiest to fix.
- Inspect the charging cable for damage — bent connectors, frayed wires, or cracks in the plastic — because cable damage is the second most common cause.
- Clean the metal connector on both the cable and the laptop port with a dry cloth, since dirt and corrosion block the electrical connection even when everything else works.
- If the outlet and cable both work but the laptop still will not charge, the battery or internal charging circuit may be failing and the laptop will need service.
- Some laptops show a charging light on the power adapter or near the port even when no charge reaches the battery, so look for that light to narrow down where the problem sits.
Check the charging cable for visible damage
Pick up the cable and look along its entire length, especially near where it connects to the power brick and where it plugs into the laptop. Bend it gently while you look. A cable that has been stepped on, caught in a door, or wrapped too tightly around something can have internal breaks that stop power from flowing even though the cable looks fine from the outside.
Look for cracks in the plastic coating, exposed wires, a connector that sits loose or wiggles when you plug it in, or a connector that is bent or discolored. Any of these means the cable needs to be replaced. If the connector is slightly bent but not cracked, you can sometimes straighten it carefully with pliers, but a new cable is safer and costs between fifteen and fifty dollars depending on your laptop brand.
Pay special attention to the connector that plugs into your laptop. On many laptops this connector is magnetic and can fall out easily, which means people yank on the cable instead of the connector itself. That yanking bends the connector inside the port. If the connector looks fine but feels loose when you plug it in, the port itself may be damaged and the laptop will need service.
Clean the connector and port
Dirt, dust, and corrosion on the metal connector can block the electrical connection even when the cable and outlet both work. Unplug the cable from the laptop and look at the metal part of the connector. If it looks dull, discolored, or has a white or green coating, it is corroded.
Use a dry cloth — not wet, not with cleaner — and gently rub the metal connector on the cable. Rub it back and forth a few times. Then look inside the charging port on the laptop (you may need a flashlight). If you see dust or debris, use a dry cotton swab or a small dry brush to clean it out. Do not use liquid or force. Plug the cable back in and see if the laptop charges.
Corrosion usually happens when a laptop has been in a humid room or near water for a long time. If cleaning does not work and the connector is heavily corroded, the cable probably needs to be replaced. If the port itself is corroded, the laptop will need service.
Look for a charging indicator light
Many laptops have a small light on the power adapter brick or near the charging port that turns on when the adapter is plugged in and working. This light tells you whether power is reaching the adapter and the cable. Check your laptop's manual or search online for your specific model to find where this light is located.
If the light is on, power is reaching the cable and port. The problem is then inside the laptop — either the battery is dead and cannot accept a charge, or the charging circuit inside the machine is broken. If the light is off, the problem is in the adapter, cable, or outlet.
Some laptops also show a light on the keyboard or near the trackpad when they are charging. If you see that light come on after you plug in the cable, the charging system is working and the laptop should charge over the next few hours. If the light never comes on, the charging system is not receiving power.
Test with a different charger if you have one
If you have access to another laptop charger that fits your machine, borrow it and try charging with that cable instead. This tells you whether the problem is in your cable or inside your laptop. If the borrowed charger works, your original cable is broken and needs to be replaced. If the borrowed charger also does not work, the problem is inside the laptop.
Be careful to use a charger made for your laptop model or one that matches the voltage and connector type. Using the wrong charger can damage the battery or charging circuit. If you are not sure whether a charger is compatible, do not use it.
If you do not have access to another charger, you can sometimes borrow one from a friend with the same laptop model, or visit a computer repair shop and ask if they can test your charger for you. Many shops will do this for free or a small fee.
When the laptop needs service
If you have tested the outlet, inspected the cable, cleaned the connector, and the laptop still will not charge, the problem is inside the machine. This usually means either the battery has failed and cannot hold a charge, or the charging circuit — the component that controls how power flows from the adapter to the battery — is broken.
A failed battery costs between fifty and two hundred dollars to replace depending on the laptop model. A broken charging circuit costs more and may require replacing the entire motherboard, which can cost several hundred dollars. Before you pay for repair, get a quote from a repair shop so you know what you are paying for.
Some laptops can run on power from the adapter alone even if the battery is dead, so you can still use the machine while plugged in. If that is the case for your laptop, you can keep using it while you save up for a repair or decide whether repair is worth the cost.
Frequently Asked Questions
Why does my laptop charge sometimes but not other times?
An intermittent charging problem usually means the connector is loose or partially corroded. Try cleaning the connector and port as described above. If cleaning does not help, the connector inside the port may be bent or the cable may have an internal break that only conducts power when bent a certain way. In either case, the cable or port needs to be replaced.
My laptop gets hot when I plug in the charger but does not charge. What does that mean?
Heat without charging usually means the adapter is working but the charging circuit inside the laptop is not accepting the power. This is a sign the charging circuit is broken. Stop using that charger and take the laptop to a repair shop, because a broken charging circuit can damage the battery or other components if you keep trying to charge it.
Can I use a phone charger or a different brand charger on my laptop?
Only if the voltage and connector match exactly. Phone chargers usually provide much less power than a laptop needs. Using the wrong charger can damage the battery or charging circuit. Check your laptop's manual or the label on the original charger to see what voltage it requires, then match that exactly before using a different charger.
What should I do if the charging port is loose or wiggly?
A loose port means the connector is not making a solid electrical connection. You can try using the cable very gently and keeping it still while the laptop charges, but a loose port usually gets worse over time. The port will eventually need to be repaired or replaced by a technician, which typically costs between fifty and one hundred fifty dollars depending on the laptop model.
Is it safe to use my laptop while it is charging if the charger is broken?
If the charger is straightforward not working, it is safe to wait for a replacement. If the charger is getting hot, making a burning smell, or the laptop is getting very hot, stop using it when ready. A charger that overheats can damage the battery or start a fire. Unplug it and take the laptop to a repair shop or contact the manufacturer.