How To Test A Laptop Charger With A Multimeter

Press the Esc key immediately once the laptop powers up.

How to test a laptop charger with a multimeter. This app detects when the charger is fast or slow if it is low or high quality it is the perfect doctor of your terminal. Another test you can do with your multimeter is to unplug the AC adapter from its power source the 110 V to 240 V wall socket and look at the impedance at both ends. This is the little plug that goes into your laptop.

Connect your laptop to the DC-in port check the size before purchase. The first test is a standard DC voltage check. Also across the test connections I have put a trimpot in series with the milliampere meter.

Try connecting a LED or just probe the ends with a multimeter and check the output voltage to see if the charger works. Reattach the leads starting with the central white strand directly to the PCB. In this video I demonstrate how I use a multimetre to diagnose a faulty laptop charger.

Before you test with your multimeter make sure to read what is required at your power adapter to be able to determine what is the indicated input or output voltages. How do I test my laptop charger with a multimeter. Press the power button to restart your laptop.

And thanks for asking. A list of diagnostics and component tests should pop up. With a fresh 15 V battery connected the meter is with the trimpot adjusted to full scale deflection.

You have to load the charger and put the multimeter in series as if it is a wire the indicated value on the charge is the rated current the current flow depends on the load resistance Ohms Law. With this simple free app you can measure the consumption of your device check the battery and check the charger. V IxR so you have to load your charger with a suitable resistive load to be able to prove that the charger.