Why won't HDMI input work after SMC reset?

I had an issue with power input on my Macbook. I connected the charger, and it seemed to disconnect and connect every two seconds. I resetted the SMC, and the problem went away. Only issue is, now my HDMI adapter won't work (throught the USB-C connector). I've tried a different adapter, different HDMI cable, different TV. I also tried resetting everything from the computer, that is SMC, NVRAM etc. Hard reset I haven't tried, but have a hard time believing that would help. Do any of you have ideas what to do, or what might be the issue? I think the USB-C connector might be faulty, but charging works normally?