"Today I have bought a new Toshiba Satelite A300 1TM, but It cannot power on"...
Are you kidding us? Have you plugged in the AC adapter and charged the battery? If so, take it back to where you bought it and have them fix or replace it for you
I bought the laptop saled in a box. I opened the box in my house and I plugged it in. After a while I tried to open the laptop but it couldn't.
The only thing happened was a breif oppening of the Power led and it turned off on the spot.
I left it in the plug for more and I tried a lot of times but I couldn't turn it on.
Yeah I will go to the store I bought it and I will ask for replacement.