How to unlock 1995 Volvo 850 radio when it shows off?

To unlock a 1995 Volvo 850 radio displaying "OFF," try turning the ignition on and then pressing the power button on the radio. If it remains off, hold down the "Seek" and "Tune" buttons simultaneously for about 10 seconds to reset it. If that doesn't work, you may need the radio's security code, which can typically be obtained from the owner's manual or a Volvo dealer. Once you have the code, enter it using the radio buttons to unlock and reactivate the unit.