iPhone 4s will not charge or turn on.
My iPhone 4S was about to die as I got home, I plugged it in at 1% and it did not charge. It then died a moment later and showed the charge alert screen (http://www.lionandbull.com/wp-content/uploads/2009/10/apple_iphone_will_not_char ge.jpg), I plugged it in with various chargers and it no longer worked.
Failing this, I plugged my phone into my macbook pro and got the alert 'Because a USB device was drawing too much power from your computer, one or more of your USB devices have been disabled'
I promptly disconnected my phone from the laptop not wanting to cause further damage.
As my phone had been unresponsive for an hour I left it alone for several hours and when I returned and pushed the home screen it showed the charge alert and I plugged it in and it began to charge (I got excited) so I left the room and walked back 20 minutes later expecting some charge and the iPhone was unresponsive again with a blank screen.
I have tried resetting the phone and followed other online tutorials.
It's very important for my business that phone contact is readily available, so any advice?
iPhone 4S