TV crashes when I connect the Xbox to it

ince 2 days ago, every time I connect my Xbox to the TV via HDMI, the TV just crashes. I have to disconnect the power supply to the TV in order to make it start again. Before this, the TV was working just fine. I know that the Xbox is making the TV crash, because the TV works just fine if its not connected to the Xbox. The moment I connect it to the Xbox, it shows the Xbox display for a few seconds, and then crashes. I am not sure whether this is a HDMI problem or if its an Xbox problem. If anyone has a solution to this please do tell me. Thank you for your help.