I keep getting unknown error "4042".....

Hi everyone.. i cannot turn my ipad air on at all ... just a black screen... when i press the power button & home button at the same time.. the Apple logo appears briefly then disappears... i have tried connecting my ipad to itunes via my laptop in dfu mode but after a while.. unknown error "4042" keeps appearing... i have tried several times with the same outcome each time... i have tried Apple support and they were unable to help... i have tried gooling this and there seems no solution to this infamous "4042" error...

Anyone able to help... would be very much appreciated..