97 camry radio and no sound.

[doublev]

I changed the battery in my 97 Camry, now the radio powers up, but I have no sound. The display shows all the preset stations, and everything appears to work except there is no sound. I took the radio out of the console and unplugged it to try to get the SEC code to display but it continues to work like it did before I changed the battery. can anyone help me? I have the unlock code if I could just get the radio to go into that mode.

Toyota Stereo Model A11712 (on the front panel)
Toyota part number: 86120-06071
Fujitsu Ten model number: 121000-4130D101

[doublev]

FYI, pressed the on / off button in, and held in for about 10 seconds and the radio came on.

97 Camry. 170,000