I have only infos for the parcel transportation regarding tablets (IATA Regulations). But I found that USA and UK do not allow the transportation in the carry-on baggage.
But better ask your airline. Maybe the IATA Guidelines could help for packing your tablet safely into your normal baggage. The only things I would do is to transport the tablet not fully loaded (ca. 30% battery capacity) and packed that way that it can not turn itself on accidentally.