Ipad not powering up

You replaced the battery and LCD yourself?

If "yes", then they're not meant to be customer replaceable. Consider purchasing a new iPad. It looks from your post as if you have an original iPad, which cannot run the latest operating system anyway (iOS 6.0.1).

If "no", then presumably you had some professional replace the batter and LCD for you. They're not really replaceable by anyone other than Apple, but you should contact the person (or organization) that did the replacement for you.

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 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

iPad: Basic troubleshooting

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

 Cheers, Tom 😉

Try a reset:

Hold the Sleep and Home button down for about 10 second until you see the Apple logo.