Hello . 2006 Volvo S40 . Factory radio CD player(5 disk) . CD player is working fine . However on either AM or FM all I get is static . I took trunk apart . Found no loose, broken, or disconnected connections . The only part that can be replaced is what I think is radio amplifier . Volvo # 30732825 . Thinking maybe this went bad so thinking of replacing it . Would that do the trick ?? If not then what would you suggest ??? Thanks very much . - Frank

Hi,

I don’t know anything about the AWD cars but when it comes to radio and players I know just a little bit.(:)

If you are hearing the player whether it be a cassette, compact disc or digital plugs-in from other sources, they each have to be picked up from their inputs and sent to a preamp circuit that goes out to the main amplifier, that drives the speakers.
The main amplifier can be in the radios or can have a separate unit mounted elsewhere.
Maybe this was why you tore the trunk apart?
Is there a CD changer back there? It has to have a cable to the head unit.

Like I said, if you are hearing the speakers work then the main amplifier is working ok.
It’s just not getting an input from the heterodyne part of the radio.
You cannot have a FM radio without the AM front end working to match the frequency or beat oscillations of an incoming signal from the radio stations. FM was built after the AM bands.
Either the radio part is not working or the switching circuit is not directing its output to the preamplifier that the main needs to work from.
It surely must be something internally to the unit itself or the antenna lead-in connection is messed up that feeds the radio signal into the AM/FM radio.
With these newer windshield mounted or hidden radio antennas. This should be considered a most likely problem.

I hope I have this close enough so you can check the owners manual for operation of the radio/player combo. Some buttons have several purposes, not just one.
Does the player unit have a auxiliary input port that might held as “selected” to override, like a phone call does in lots of cars.

I’m 240 man that has been learning about these newer overly complicated items.
Now with programmed equalizations and things that die when you disconnect a battery.
These units are not equal with lots of humans. Like VCRs with the wrong time, until they put that in the cable signals.
I have been lucky twice, that my previous owners of my players didn’t use personal codes to lock out any thieves.

Good luck hunting this all down.

Phil