How do you know that your charger is faulty?
Each AC/DC power adapter is specifically designed to accept a certain AC input and convert it to a particular DC output. Likewise, each electronic device is specifically designed to accept a certain DC input. The key is to match the DC output of the adapter to the DC input of your device. Determining the outputs and inputs of your adapters and devices is the hard part.
The reason why finding out if your charger is faulty is because, the following situations will cause damage to your device:
Higher voltage adapter than device rating
Lower current adapter than device rating
Here at Laptop service center Malad, we will check your chargers and tell you if you have a faulty piece.
If your charger wire is frayed the it needs to be replaced or else the wires inside will short and cause the motherboard to get dead. We have to check the charger with a multi-meter. Magsafe chargers are repairable. Other chargers are not repairable, we have to replace the entire adapter.