I plugged the power cord directly to the laptop and it charges my laptops battery. Vacuuming these vents is the first step in fixing an overheating Elitebook.
Features Deliver pass-through charging 1 to your notebook PC or tablet when you connect its USB-C™ AC adapter to the dock’s USB-C™ port. As the battery ages it will require more current to charge, and retain less of that current. I have an Hp EliteBook 8740w with a blank screen and blinking leds. If it is plugged in and the charger light is not on, then please consider replacing the charger.
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