1.) The first thing you should check is your tv is on the right input for the HDMI input from the Amazon Fire TV. Then make sure both connections are secure the correct tv input port and the Amazon Fire TV output port.
2.) If nothing seems loose and you still have no image on your screen, check for any cuts, scrapes, or damage to the HDMI cable. If another cable is available, switch it out to rule out the cable is not working.
3.) If you still have no signal try another tv, then try turning off the Amazon Fire TV and wait 5 to 10 seconds. If none of the above the steps resolve the issue, you may have physical damage to the port. You should then refer to the troubleshooting page:
[[Amazon Fire TV Troubleshooting]]