Acer Aspire laptop won't turn on...?

I purchased an acer Aspire 5253, model no: p5we6. It was not refurbished but it is a factory second (damaged box etc so they re-package and sell them a bit cheaper). It didn't turn on when I tried to start it Friday so I returned to where i purchased it and it turned on first go! Feeling a little silly I figured I'd just held the button down for too long or not for long enough. Anyway, it worked great last night as we tested a few trial games that came with the laptop until this morning when i went to turn it on again before heading out to purchase a new USB wireless internet and... It will not turn on again!!!! I've charged it, kept it plugged in for over 2hrs and it still will not switch on. I'm obviously returning it tomorrow but has anyone experienced anything similar with an acer before..? Please help, this was my girlfriends 30th bday present so i'm pretty disappointed to say the least and could use some advice, if not ammo when i return to the computer place tomorrow so I don't feel stupid again lol Many thanks :)