Hello Everyone, It's an issue only with Flex. Because that sensor is on only the part who detects the Flip cover and if sensor is not on flex then obvious On/off Function will not shown up on the screen in settings. It's work like if Your Computer has wificard or any other device then it's only shown at Device manager because computer knows that There is a device attached to me if not then computer not gona show anything. Same as there if sensor is there then it's shown otherwise you have to Decompressed or Short a Sensory memory Supply. So system will Show on/off button Thanks. This is genuine Way and easiest. If you find other please Share.

Hi, i Found a solution. There is a soldring point for a sensor (near the home button or on left hand side when ipad dizitizer front side is down). when you used after market dizitizer on that there is no sensor there is blank space. so what have to do now if you can't put sensor over there, just wet your fingre little bit and clean then touch on blank soldering point, when you touch there your device will wake and sleep by touching when its wake by touching there then just go to setting > screen brightness > then only option will come for (power button) (Lock/Unlock) by on/off that your ipad mini power button will work start again as it was working before. but don't update it without backup other wise you have to do this again. Thanks, If you don't understand anything by this post you can contact me or ask me here. Thanks -Lovejeet Singh.