My Element TV Model ELEFW408 speakers are not working. I haven't used this tv in years and today I decided to plug in the Amazon Fire TV into an HDMI slot. It had sound for a while until it only stopped and had no sound. I switched out the Fire TV stick and used my gaming console to see if the fire stick was the problem with an HDMI. Not only were there still no sound, but all three HDMI slots produced no sound. The sound only works if I have in headphones. How do I fix the speakers so I can watch my Fire TV?