my ipad gone all black, unable to on or charge it

Try a reset:

Hold the Sleep and Home button down until you see the Apple logo.

Frozen or unresponsive iPad

Resolve these most common issues:

• Display remains black or blank

• Touch screen not responding

• Application unexpectedly closes or freezes

http://www.apple.com/support/ipad/assistant/ipad/

iPad Frozen, not responding, how to fix

http://appletoolbox.com/2012/07/ipad-frozen-not-responding-how-to-fix/

iPad Frozen? How to Force Quit an App, Reset or Restart Your iPad

http://ipadacademy.com/2010/11/ipad-frozen-how-to-force-quit-an-app-reset-or-res tart-your-ipad

Black or Blank Screen on iPad or iPhone

http://appletoolbox.com/2012/10/black-or-blank-screen-on-ipad-or-iphone/

What to Do When Your iPad Won't Turn On

http://ipad.about.com/od/iPad_Troubleshooting/ss/What-To-Do-When-Your-Ipad-Wo-No t-Turn-On.htm

iOS: Not responding or does not turn on

http://support.apple.com/kb/TS3281

iPad: Basic troubleshooting

http://support.apple.com/kb/TS3274

 Cheers, Tom 😉