Dell Inspiron n5040 won’t power up, when I plug the charger the AC Adaplter led turn off.

Problem: Dell Inspiron n5040 won’t turn on and when you plug the AC Adapter, the AC Adapter led turn off or blink, that is a common problem in Dell Inspiron n5040 caused by a short in SMD capacitor.

Solution Steps:

1) Test the laptop with a new power adapter.

2) Disassembly laptop and check the SMD capacitor shown in picture below:


If there is continuity the SMD capacitor is faulty, replace the SMD capacitor will solve the problem.

Useful Links:

Test the Voltage and Continuity with a Voltmeter

How to test Laptop Power System

Dell Inspiron 15 N5040 won’t turn on problem

Download Dell Inspiron 15 N5040 Driver.

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