Sony STR-DH550 hdmi help

[Hornnumb2]

I have my fire tv plugged into sat/catv input on receiver and feeding sharp tv lc-70c6600u through hdmi. Tv turns on then receiver turns on and displays TV input and fire tv is seen but no audio. I can switch receiver input to sat/catv and have both. I dont see a hdmi port labeled tv, it is probably getting the signal from tv. If I turn off cec on sharptv, then I get no receiver power up. Any suggestions. Thanks Michael