Dell Latitude ac adapter lights turn off when plugged in. Laptop won't turn on

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Apr 9, 2016
I was working on my Dell Latitude e5540 and suddenly it turned off. The ac adapter and battery were in.
Now it won't turn on.
The lights on the ac adapter (original) are off. If I plug the adapter to the wall the adapter lights turn on, but when I plug it into the laptop the adapter lights turn off immediately. Of course the laptop still turned off.
Same thing happens when I remove the battery, the ac adapter lights will turn off.
The laptop won't turn on with just the battery in neither.
So the battery is OK and the adapter is OK.. (I have no other battery or adapter to check with).

So the motherboard is necessarily finished?


Here are some troubleshooting steps that may help in identifying the problem.
- Start by doing a hard reboot, remove the battery and unplug the AC adapter then press and hold the power button for 20 seconds then try booting it up again.
- If this will not work, do test the AC adapter if it's working properly. Remove the battery and power the laptop with just the AC adapter connected and see if it will boot up or not. Do also try a different AC adapter that has the same voltage and see if it will work or not.
- Proceed with reseating the RAM's if trying a different AC adapter will not work, remove them all for couple of seconds then put them back in making sure everything is seated properly.
- If all these will not work the problem is the motherboard itself.
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