How to Use? Connect an HDMI source device (such as a PS4) to the input port of an HDMI switcher. Connect the HDTV input port to the HDMI switcher output port. Connect the USB Charging Cable. After all connections are successful, you can watch HD video soon your HD TV or monitor. FAQ's & Troubleshooting; (about HDMI TV without audio and video) First, check whether the indicator light of the switcher's HDMI input and HDMI output is on. And it has been working properly if the answer is positive. If the light is not on. Please check whether the signal source and TV are on Please check if the USB power cable is connected to 5V1A power supply. Then, Check if your signal source and TV are working properly; Whether the signal source is in normal operation. Whether the TV has been set to correspond to the HDMI interface input mode. Whether signal source and TV resolution are unified. Our switchers support downward compatibility up to 4K 60Hz, so you need to ensure that your signal source, TV and HDMI cable also support 4K 60Hz. Please set the resolution of your source (e.g. PS4) to 4K 30hz or below if the interface of your signal source is HDMI version 2.0 (such as PS4) which supports 4K 60Hz, but your TV or HDMI cable is HDMI version 1.4, otherwise the switcher will not work properly.