HDMI not getting signal

[ez101]

Can someone help me out? I have a 1080ti with a waterblock on it that I"ve been using for a couple of years. I get a signal on the display port and in the past I had a second monitor plugged in to the HDMI and all was good. Anyway, I installed into a new case and rad configuration. I noticed GPU was getting much hotter than normal. I took the card out first to check the block for clogging, took block off and reapplied thermal paste... and then later realized it may have been poor air flow to the bottom radiator because I had put in some really thick dust filters.. and air flow was really bad so I removed those. Anyway, card is re-installed and works fine (games etc.), temps are great - however now the HDMI port isn't sending a signal? Actually, neither of them is...Why would the HDMI ports no longer work yet display port does and temps a excellent. I noticed that if I boot with only the HDMI connected monitor I see the boot screen but eventually the signal goes off. I have checked and cables not the monitor is not the issue. Windows does not recognize the monitor or TV plugged in to either HDMI port.