Radio Speakers not working

[amerson2]

I have a unusual problem. The front radio has no sound coming from the
speakers. This has just happened a few weeks ago. I can see that the
radio is getting a signal as the stereo light will flicker and the cd's
will change songs.
As I was waiting for tires to be installed today I turned the master
switch under the dash off. After the master switch was turned off the
radio would play for app. 2 seconds, off for a second then come on
again for about 1 second very faintly. The light display on the radio
would remain constant during this. I tried this several times with the
same result.
Any ideas?

Pete Amerson
87 PT-40
Century FL