Hi Rixson,
I suggest that you shut the system down, remove the battery and disconnect the ac adapter, press and hold the power button for 20 to 30 seconds. Now connect only the ac adapter and wait for 30 seconds and turn on the system. This will drain any residual charge in the capacitors.
If the issue persists, I recommend you to pay attention to know the no of beeps at start up. Reply with the status to assist you further. Also send me a private message with the system service tag to check the warranty and provide the best option available to get the system serviced. Click on my name and click Start Conversation to send me a private message.