Hard reset the Lenovo Ideapad A3000 using the following button combinations,
Switch off the tablet and press the power and volume up button together.
Through hard reset method you can also bypass the pattern lock. Hard reset button combinations varies from tablet to tablet, to know more about the hard reset see the following link.
http://mytabletguru.com/differnt-hard-reset-factory-wipe-methods-for-tablet-pc/
