It sounds silly, but you need to make sure the laptop is actually plugged in. No software tweak or hardware repair can make a disconnected laptop magically power on. So before you do anything else, ensure that the AC outlet and laptop plugs are firmly seated.
Check the AC adapter brick and verify that any removable cords are fully inserted. Next, make sure the battery is properly seated in its compartment, and that there is nothing wrong with either the battery or laptop contact points.
Finally, find out whether or not the problem even has anything to do with the laptop at all. Try plugging the power cord into a different outlet to see if you’ve got a short or a blown fuse. If it’s plugged into a surge protector or power strip, take it out and plug it directly into the wall.
At this point, if it still doesn’t work, we’ve determined that it’s not just user error causing the problem. There is a real issue with powering the laptop; now it’s simply a matter of figuring out where the problem may be. That begins with eliminating where it isn’t. We’ll start with the most common and easy-to-address issues.
Lose the Battery
First, check the integrity of the battery. If your laptop comes with a removable battery, take it out, and hold the power button down for about 15 seconds to drain any residual power from the device. Then, with the battery still removed, plug in the power cable and turn the laptop on.
If the laptop powers on properly, that means the power adapter is working properly and the problem is likely a bum battery. Though you can always re-install the battery and try again—maybe the battery was just poorly seated.
If your laptop doesn’t have a visible battery compartment on the bottom, it may be built into the laptop (like most Macs are), and you’ll either have to open it up yourself or take it to a repair specialist to test the battery.
Make Sure You’re Using the Right USB-C Port
USB-C is a popular cross-platform standard for connecting peripherals, transferring data, and charging your battery. The new standard allows for thinner devices, but might also cause some confusion. Some manufacturers have opted to make certain USB-C ports data-only, so they won’t charge your device.
Is Your Charger Powerful Enough?
Similarly, just because a power adapter fits into your laptop’s charging port doesn’t mean it’s powerful enough to charge your laptop. This goes for any type of charger, but it’s an especially common problem with laptops that charge over USB-C—you can technically plug in any USB-PD charger, but some may have too low a wattage to properly charge.
Check the Connector
When you plug in the laptop’s power connector, the connection should be fairly solid. If there’s dust or other buildup inside the jack, it may not be able to make a clean connection. Try cleaning out the jack with a toothpick, and plugging in again.
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