Try the following:-
1.) Unplug the power cord and the battery.
2.) Press the 'Power' Button 10 times repeatedly.
3.) Then hold the 'Power' Button down for 25 seconds.
4.) Put the battery back in and plug the power cord back in.
If it shows no sign of life then try removing the RAM and HDD one at a time to diagnose if it boots or throws any errors. If no go then maybe it's the motherboard that needs to be replaced.
Hope it helps.
Maraming salamat bossing.. BM ko ung suggestion mo.. d pa ko nakauwi ng bahay e..