Playbook Locked Up!

I was surfing the web tonight and my playbook locked up. I tried to power it down, but the power button isn't working. I've tried connecting it to my computer, but it isn't recognized. Now it just sits, screen on and locked up. Any thoughts other than returning it?

Press power, up and down volume buttons all at same time for several seconds.

Hold down the power button for ten seconds. Only if it keeps happening would I ever consider returning it.

Ok, I held the power button for 10 seconds and that worked! I held it down before, but apparently not long enough. thanks for the help ... this forum is the best!!!

No prob. I too had my first ever lockup earlier this evening, after more than five weeks of use.