I had previously played with this button and it gives me a mute icon rather than a lock icon.
In the meantime,while I was waiting, I was trying to turn the ipad off again and I got as far as it showing me a picture of an usb cable ---> itunes logo. My itunes on my computer says: my ipad cold not be restored. An unknown error occurred (1644). Now what? Jona
It's flickering back and forth between "synch in progress" page and the black and white apple logo page. And the switch logo is a mute button not a lock. Jona
I didn't have to ask. They said if this didn't work then they would replace it. Luckily telling my laptop that this was a new ipad did the trick. Of course then I had to go into settings and re-connect to my wireless router, change my backdrops, and rearrange my apps etc, but that actually didn't take too long. Let's hope I never have to repeat the process! Thanks for all your help. :-) Jona