iPad Air 2, replaced LCD digitiser screen due to cracked glass and all working fine before replacement. The home button...

The connection was not correct for the home button and once connected all worked. Thanks Andy and guided forum. The problem fixed and thanks again. Shashi

Thanks for the reply Andy, I have reconnected with old cracked previously working screen but didn't had any luck. Didn't try disconnecting the battery and don't know how to do it. The iPad is not working may as well try. Please post any critical do's and don'ts. Thanks Again Shashi