I just found out that my Acer KAV10 won't response to power button nor working battery as I got another laptop but for spare purpose and found it turn on well on spare laptop and spare laptop have problem charging up but that not the concern.
I suspect that I may have mistaken put wrong power cord on it and checked but they are still the same voltage and current on it.
As I got IPad 3 on last March, I haven't used my laptop since now, and been kept in box securely in my room.
As I need my laptop back to working so I can sell the laptop to friend which he will be buying for $50 as he's a good friend actually.
Thanks for any help in advance.