Hoping someone can help with this. I have a 2003 fx35 and some months back sound went out suddenly on radio. Everything lights up but no sound. Today I pushed the mute button and it came on! Worked perfectly....so I'm thinking, must have hit that button months ago and that's what it was. Tonight I turn on the car, radio working fine with sound... I go to show my husband what I did to fix it. Push the mute button...it turns off...and push it again...and now it won't come on again... and we pushed it several times! What am I doing wrong?? Nothing in the owners manual about it. I know it works...it was on all afternoon! Any ideas?