Radio and casette do not work - sometimes
 

1999 Camry LE
Sometimes (the last time it happened was today), the cassette and radio do not work. Only the CD player works. When on radio, I see the display showing the station - if I press scan button, I see stations being scanned, however there is no sound. When on cassette, I see the display showing 'Play', but no sound. If I put the engine off and on, all three, CD player, cassette and radio work.

This has happened about 3 times in the last 6 months.

Any help in identifying the cause of the problem will be highly appreciated.
Thanks in advance.

RE: Radio and casette do not work - sometimes
 

Does the radio have a mute setting? Built-in or remote amplifier?

RE: Radio and casette do not work - sometimes
 

Well, unfortunately, I do not know :(. Is there any way I can find out?