I have a 2005 mazda6 i. I have lost partial function of the radio and hvac controls. It seems like I need a new circuit board, the power button/volume control is not working for the radio, but the presets do. the blower, temp, and settings ***** work, but the three buttons for a/c, air, and rear deforoster don't. The steering wheel controls work for the radio/cd, but I can't eject the cd that is in. Any advice? The board from the dealer is $517.00!!

 

you could get one from a salvage yard which could inculde the audio unit & cd player too.
this board is easily damaged if hit or bent in any way. so be careful when removing & installing the radio.
typically the information display also goes on te fritz when the board goes bad also.

 

Thanks, the information display is partialy gone, too. The radio power **** took a direct hit from my knee, probably what caused this. The board isn't cracked, but it did bend a little.