my itouch would not turn on so i plugged it in to my pc and it still dident turn on. i was really worried beacause it was only new. i held down the cirle button and the power button at the same time for a few seconds and it turned on!!! try it! it might work for your itouch too. i hope this helps.
Hold down the power button and the home button. When you see logo or anything release the power button BUT CONTINUE TO HOLD DOWN THE HOME BUTTON! Go to itunes and then restore! Promise it will work!