So, let me understand. The HDMI works never? HOW many HDMI ports does your tv have? If you turn off the tv, and the laptop, plug them into together via HDMI, turn on tv, then laptop what happens?
Does any other HDMI device work in the same TV port?
Remember, HDMI is not a a standard. So, in othe words, not all manufacturers play in the same sand box when it comes to agreeing on how HDMI will actually work.