Computer no longer has sound through hdmi

Computer turned on normally, was watching a video on youtube with no issues, suddenly the display switched off, tv displayed standard no input message, restarted computer, and no longer had sound through to the tv, changed hdmi, still no sound, tested ps4 with hdmi, both hdmi and tv worked with sound, updated sound drivers on pc, ran troubleshoot, only thing I think it could be is a gpu issue at this point?