If your monitor and cable are working, it is possible that your input device is not. Check to be sure that it is plugged into a power source that works and turned on. Next, if this does not solve your problem, disconnect your computer, DVD player, or another input device from your cable, and plug in a new input device. Original ASUS PA-1121-28 120W 19V 6.32A Slim AC Adapter Charger 5.5x2.5mm w/AC Power Cord, for Asus Zenbook UX510UW-RB71 / N550J N550JV /GL551 /GL552 /ZX53 ZX53V ZX53VW ZX53VD ZX53VE Gaming Laptop PSU When connecting two USB 3.1 devices, the USB-C cable will support data transfer rates that are twice the speed of existing USB technology (up to 10Gbit/s), enhanced power delivery of up to 20 volts, 5 amps, and 100 watts for power and charging, and built-in support for DisplayPort video and four channel audio (speaker and microphone).