A lot of people are writing this. usual procedure another usb cable, try another usb connector in the PC. the display should report as an android device after connecting. 3.5" should light up white. And above all, make sure that it is not a display that is intended for AIDA64. Then I don't know anymore, as a last resort I would conclude if you have not come across the wrong piece. Or try to connect after restarting the PC if you are not confused USB.