I suggest you to perform these steps.
Test the AC adapter
Follow the steps below to determine whether the problem is related to the AC adapter or your notebook system board.
Remove the battery and disconnect all external devices from the computer.
Hold the Power button for several seconds, with all power sources removed. This drains residual power from the system, and may correct many problems.
Connect the AC adapter to a wall outlet and plug the other end into the computer.
Press the Power button to start the notebook PC.
If the notebook does not start or the display is blank then check the power indicator light or power socket LED.
I suggest you to connect the notebook to external monitor and check whether its working or not.
Then please perform the harddrive self test also.
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Remove the main battery and try again, no change! remove the ram memory one at a time, testing as you go making sure there is one ram stick in the slot at all times. If none of these work, the motherboard is the likely problem and you will need a technician to access.
Is there any fan/cooler sound or some light flashing after you press ON button? If nothing indicates that power comes to the computer - make sure the AC adapter cable is not damaged and battery isn't completely dead. If you don't have an indicator lamp for testing electricity in the AC adapter cable - bring it to the computer repair service.
If not even the manufacturer's/motherboard screen appears, nor BIOS starts to load, and if there is no sound, nor flashing hard disk indicator that the computer load something from the hard disk - then the problem has occured in your motherboard, and you can't fix it yourself. If 3 beeps occur (unless motherboard sounds have been turned off), then your motherboard is most probably dead.
In any case bring it to the repair service, or to the warranty service if the warranty is still working (within the European Union the warranty is minimum 2 years, in USA should be something similar). But if your warranty period isn't over yet I strongly recommend to ask for a new laptop, don't accept the old one to be repaired.
P.S. Don't worry about your data on the hard disk - they are most probably intact. Just remove the hard drive, plug it to another computer and almost all the data without problems.
P.S. If this helped you to solve the problem (or at least brought some clarification) - rate this solution with 4 thumbs up! But before you would give a negative rating - post a comment, so I could improve my solution to satisfy your needs. Thank you!
Try removing the memory Dimms and see if it shows post screen. If that does not work then try removing the hard drive and cd-rom drive. The computer BIOS should still show video on the computer with these components removed. If still nothing then try resetting the cmos for the Bios by using the jumper pins or removing the watch battery for about 20 seconds then re-install. After that if the computer still does not start then the laptop motherboard is probably bad.
Test your notebook with an external monitor
attached to the VGA port on the side of your notebook. If both internal
and external monitors have no image, this problem is not related to the
It could be memory related problem. Try reconnecting the memory
module. If you have two modules installed, remove them one by one and
test the laptop with each module separately. It’s possible that one of
the memory modules is bad and your notebook will start as soon as you
remove bad RAM.