Could be useful with a bit more infomation, but if this just happened you should try to let ur computer cool down for a hour or two, if its overheated, and try turn it on again later. Of course, if you've had this problems for several days this won't work, as I tried to express before; this is only if the problem has just appeared, because it happens to me very often.
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Try unplugging AC power lead and then take out the laptops battery, plug the AC power lead back in and try turning it on, see what happens. If the laptop turns on then there is a problem with the battery.
1. Take the battery out of the laptop & try to turn on the laptop using power adapter only. If the computer turns on, then the battery is defective & needs to be replaced. 2. Make sure the power adapter is not defective. Test the output voltage of the power adapter using a voltmeter. Compare the voltmeter reading to the nominal value written on the adapter or the laptop. 3. If you have another processor which is compatible with your laptop's model, try swapping processors & test to see if the laptop will work. 4. The power button could be bad. 5. The motherboard could be defective & needs to be replaced.
Hi do one thing remove the battery from the notebook and unplug the power cable press and hold the power button on the laptop for 10 to 15 seconds. connect the battery and power , turn on the notebook, it should work Good luck :-)