If you suspect that your AC adapter (also known as a power adapter or charger) has gone bad, there are several signs and symptoms you can look out for:
No power output: When you plug the AC adapter into an outlet and connect it to your device, there is no power output, and your device doesn't charge or turn on.
Intermittent power: The AC adapter may supply power inconsistently, causing your device to charge or operate erratically.
Strange smells or noises: If you notice any unusual smells (like burnt plastic) or hear strange noises (like buzzing or clicking), it could indicate a problem with the adapter.
Overheating: The AC adapter becomes unusually hot during use, which could be a sign of internal issues.
Frayed or damaged cables: Physical damage to the AC adapter's cables or connectors can lead to a loss of functionality.
Visible damage: Look for any visible damage to the AC adapter, such as cracks, dents, or signs of water or liquid damage.
LED indicator issues: If your AC adapter has an LED indicator to show its status, but it doesn't light up or behaves unexpectedly, it could be a sign of a problem.
Device not charging properly: If your device doesn't charge as quickly as it used to or loses power rapidly even when connected to the adapter, the adapter could be the culprit.
Test with another adapter: If you have access to another compatible AC adapter, try using it with your device to see if it works properly. If the device functions correctly with the new adapter, it suggests the original adapter is likely faulty.
Use a multimeter: If you have access to a multimeter, you can test the output voltage of the AC adapter. Compare the measured voltage with the voltage specifications mentioned on the adapter label. If the measured voltage significantly differs from the specified voltage, the adapter might be faulty.
If you notice any of these signs, it's a good idea to stop using the AC adapter immediately to avoid potential damage to your device. In such cases, you should consider replacing the AC adapter with a new, compatible one from a reputable manufacturer. Always make sure to use the correct voltage and current ratings as specified for your device to avoid any further issues.