I would have thought that setting the Blu-ray to output PCM stereo sound should allow that to send the sound to the TV through the HDMI? (you may have to disable secondary audio and turn on PCM downmix)
It's strange that none of the audio options in the Blu-ray menu produces any sound?
My only other thought is that you are perhaps plugging it into an HDMI port on the TV that is designed for a computer connection via a DVI to HDMI lead, so it might be looking for the sound through a separate associated 3.5mm socket?
It might be something you can configure in the TV menu for that HDMI port.
Have you tried another HDMI lead, just in case it's faulty?
If you tell us the TV model and Blu-ray model, someone might be able to get an answer by googling.