One of these will definitely work
HDMI to DisplayPort Not Working – How Do I Fix It? [SOLVED]
If you have an HDMI display but only a DisplayPort output, you will need a DisplayPort to HDMI adapter. However, many people find that these don’t seem to work and are left with nothing more than a ‘no signal’ message.
There are numerous compatibility issues when converting to this particular display standard. But if you know what to look for, it's actually easier than it seems.
A DisplayPort to HDMI cable is not bidirectional. It is designed to work as an output device, meaning that it allows you to connect a DisplayPort computer to an HDMI input.
