Laptop power does not turn on, when the power of a laptop does not turn on, it can be a big source of worry and discomfort, but don’t draw a conclusion just yet or write off the laptop because it could well come back to life. A number of reasons can be attributed to a laptop not powering on, we will take a critical look at some of these reasons and at the same time try to provide solution to these problems.

Solution to the problem will vary from simple to complex procedure that might require a bit of technical no how to handle, but the main purpose will be to help you solve your problem at a minimal cost.

Possible Faults

1.Laptop AC power adapter is faulty or burnt

2.Battery does not hold charge

3.Cut or broken power cord

4.Broken or loose DC jack connector

5 Failed motherboard

Solutions

1.Try this first, remove the power cord and battery of the laptop, hold the power button for about 60 seconds, then connect back the power cord and turn on the laptop. If the power comes on, turn off the laptop again and put back the battery, then turn on again.

2.Check the LED indicator of the laptop’s AC power adapter, if it is on, then it means that the adapter is been supplied with normal voltage from the power socket, but if it is off then it means that the adapter is faulty or burnt and needs to be replaced.

3.Confirm that the laptop battery is holding charge by checking if the charging indicator or LED is on, if the charging indicator or LED is on and stable, then it means that the battery is charging but if the charging indicator or LED is blinking continuously, then it means that the laptop battery is bad and does not hold charge or is not charging, hence it needs to be replaced.

4.Physically inspect the adapter’s power cord to check if it is broken or cut at any point. If it is broken at any point or there are noticeable cuts, unplug it from the AC power and repair with electrical tape or better still replace it.

5.Check the DC jack, if it is separated from the motherboard (or DC jack broken) and the laptop doesn’t get any power from the AC adapter. In this case the DC jack has to be replaced.

6.If non of these steps is able to rectify the problem then you have a dead or failed motherboard. Replace the motherboard or buy a new laptop.

Source: http://www.learnlaptoprepair..com/2013/07/how-to-repair-laptop-that-does-not.html