55UK6300PUE

I have this TV connected to my computer with HDMI. It seems to work until I turn everything off and back on hours later.

suddenly (without changing anything) I get the no signal screen. now here's the kicker, if I plug the HDMI cable into another port, I suddenly get a picture. so you'd think the HDMI port would be bad, BUT, later on the same thing will happen on the port I just switched to, and I will plug it back into the other one and get a picture again. and yes I have the right HDMI port selected, that isn't the issue

I honestly have no idea what is causing this. If I turn everything off and right back on, I get a picture, but if everything is off for hours something seems to happen.

anyone experienced this??