The reason why Angkewei carplay does not display: 1, the data line of the mobile phone is broken or broken; 2. The metal contact terminals on the 2.USB plug and the mobile phone plug have foreign bodies attached or their surfaces are oxidized; 3. The USB female socket of the external USBHUB of the vehicle-mounted host is damaged internally; 4. The contact metal sheet is in poor contact with the USB male; 5. The connection between the vehicle-mounted host and the external USBHUB is loose. The car screen connected to carplay is not displayed, which may be the following problem: 1. Apple official website made it clear that carplay supports the connection between mobile phone and central control via Lightning or WiFi. At present, most cars on the market are wired, and very few are wireless. If Carplay is used normally, the original data cable of the mobile phone needs to be connected to the correct USB port on the car, or a data cable that can transmit data. There are many 3-in-1 data cables or several-dollar data cables on the market, which can only be charged and cannot transmit data, so they cannot be used. 2.USB port error. Some models have only one USB port connected to Carplay, and some models may have an interconnection mark on the USB port. Remember that there must be no lighters or car charging interfaces. The USB port interface is generally under the central control panel or inside the central control armrest box.