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When you plug in your laptop, you usually find yourself greeted with a cheerful chirp from your PC, a new glowing LED indicator light, and a display that perks up and beams a bit more brightly.
At least, that's what it's supposed to do. Sometimes, though, you connect the AC adapter—usually because the battery is nearly drained—and you get nothing. No glowing lights, no brightened display, and no 'battery charging' icon in the corner. What could be wrong?
There are numerous ways to take care of your battery, but between the wall outlet and your computer there are several steps and parts that can all fail. Some are easy to fix yourself with a software tweak or a new battery, but other problems may require a visit to a repair shop or even a full-blown system replacement.
Knowing which is which can save you hours of frustration and hundreds of dollars in repairs. By taking an inside-out approach, you can quickly narrow down where the problem originates and find the most economical solution.
Get ready, boys and girls, it's time to go troubleshooting.
Are You Plugged In?
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 that 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, 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 then click the 'Additional Power Settings.' (On older versions of Windows, open the Control Panel and search for 'Power Options.') Click 'Change Plan Settings' and visually check that all are properly set.
Be on the lookout for incorrect settings for the battery, display, and sleep options. For example, your battery settings may cause trouble if you set the computer to shut down when the battery level drops too low or set the low battery level at too high a percentage.
You can also assign actions like sleep and shut down when your lid is closed or the power button is pressed. If these settings have been changed, it's easy to suspect a power malfunction even though there's no physical problem with the battery or charging cable. The easiest way to make sure that your settings aren't causing problems is to restore the power profile to default settings.
For Mac Laptops
In System Preferences, select the Energy Saver pane and review your preferences. Mac settings are adjusted with a slider, letting you select the amount of time the computer can sit idle until it goes to sleep. If the interval is too short, you might suspect battery issues when settings are the true culprit. And don't forget to check these settings for both battery power and wall power. You may want to revert back to the default settings to see if a change in settings is causing the problem.
In System Preferences, select the Energy Saver pane and review your preferences. Mac settings are adjusted with a slider, letting you select the amount of time the computer can sit idle until it goes to sleep. If the interval is too short, you might suspect battery issues when settings are the true culprit. And don't forget to check these settings for both battery power and wall power. You may want to revert back to the default settings to see if a change in settings is causing the problem.
Update Your Drivers
For Windows Laptops
Open the Start menu and search for 'Device Manager.' Under 'Batteries' you should see a few items: usually one for the charger and one listed as 'Microsoft ACPI Compliant Control Method Battery,' though there may be others. Right-click each item and choose 'Update Driver.'
Open the Start menu and search for 'Device Manager.' Under 'Batteries' you should see a few items: usually one for the charger and one listed as 'Microsoft ACPI Compliant Control Method Battery,' though there may be others. Right-click each item and choose 'Update Driver.'
Once the drivers are all up to date, reboot the laptop and plug it in again. If this doesn't resolve the problem, you may want to download the latest driversfrom the manufacturer's website. You can also try uninstalling 'Microsoft ACPI Compliant Control Method Battery' completely and rebooting, which should prompt Windows to reinstall the driver from scratch.
For Mac Laptops
On a Mac, you'll need to try resetting the System Management Controller (SMC). For laptops with removable batteries, this is as simple as shutting down power, removing the battery, disconnecting power, and pressing the power button for 5 seconds. Reinsert the battery, connect power, and fire up the laptop.
On a Mac, you'll need to try resetting the System Management Controller (SMC). For laptops with removable batteries, this is as simple as shutting down power, removing the battery, disconnecting power, and pressing the power button for 5 seconds. Reinsert the battery, connect power, and fire up the laptop.
For newer Macs with batteries sealed into the chassis, shut down the computer, but leave the power adapter connected. With the power off, press and hold the power button while pressing the Shift-Control-Option keys on the left-hand side of the keyboard. Release the keys and power button simultaneously, then attempt to power on the laptop.
Call In Outside Assistance
If you're still having problems, this is probably a good time to contact tech support. Your particular make and model of laptop will likely have its own unique issues, and a seasoned tech support operator will have seen all of them.
The person you talk to will likely walk you through many of the steps outlined above, but will also be aware of software and hardware issues specific to your configuration, such as what bits of hardware commonly fail.
Swap Out the Cord and Battery
If the above software tricks don't work, and you aren't able to fix the problem with the parts you have on hand, you may have to buy a new battery or power adapter (which one will depend on what you were able to narrow down with the above troubleshooting steps).
You may be able to find a replacement power cable or battery on Amazon, but make sure it's a legitimate part from the original manufacturer. Replacement parts from third-party manufacturers, particularly when it comes to batteries, can be of low quality and even dangerous.
Your best bet is to contact the manufacturer directly and order a replacement part, if you can—it'll be a little more expensive, but you'll know you're getting a quality component.
Problems Inside
When all of your options are exhausted—you've tried other power cables and batteries, you've checked and rechecked your settings, you've fixed any potential software problems—the problem is likely found inside the machine. Several internal parts can cause problems when they malfunction or fail.
Common culprits include a faulty motherboard, damaged charging circuits, and malfunctioning battery sensors.
Like a sick person consulting a doctor, internal problems require a specialist. Contact your manufacturer about what repair options are covered under your warranty, or call up a local computer repair shop.
For more, check out 9 Tips for Longer Laptop Battery Life.
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