iphone is stuck on loading screen

connect that to wall charger for 10-15 minutes.

Disconnect you phone from your pc leaving the wire connected to your phone not your pc.
open itunes
hold sleep wake button + home button until your screen goes blank...
let go of sleep wake button and continue to hold home while plugging back into pc... should take about 15-30sec and itunes will see your phone in restore mode

BEST OF LUCK

I had the same problem and have been searching for a solution for an hour. This finally worked. Thanks!

thanks for feedback of my post....

I tried that as well. And restoring it from iTunes and the charging idea from above. It still shuts off and then if and when it does power up, it has the apple screen like it's resetting. If and when I get to the home screen, it shows my battery low and shuts off again - even though I just fully charged it. What is the next step - a repair shop? Or hopefully someone has some more tips? Thanks for the original posting of the issues - this is exactly why I came here today!

This didn't work for me - do you have any other suggestions? Thanks.