as of 2 days ago, the radio and clock stopped on 1991 Volvo 740

The radio and clock have no power to them, my hubby checked and doesn't think it's the fuses....what else could it be?

Asked by for the 1991 Volvo 740
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By clock you mean the clock display on the radio?
but, what could the problem be with radio stopped working? I'm buying a used 1991 volvo 740 turbo wagon and the radio has been disconnected