You said you tried the home and power buttons. Did you hold them at the same time until the Apple Logo appears, then let go?
YOU CAN ALSO FORCE IPAD INTO RECOVERY MODE
1. Turn off iPad
2. Turn on computer and launch iTune (make sure you have the latest version of iTune)
3. Plug USB cable into computer's USB port
4. Hold Home button down and plug the other end of cable into docking port. Do not release button until you see picture of iTune and plug (very important)
5. Release Home button.
6. iTune has detected iPad in recovery mode. You must restore this iPad before it can be used with iTune.
7. Select "Restore iPad"...
Note: Data will be lost