How to unlock TR-40 CRA system password

How to unlock TR-40 CRA system password

Purchased used "TR-40 CRA" via eBay from seller in Oklahoma. I cannot use unit here in California (Bay Area) because unit is "password locked". I sent seller email requesting old password so I may reset (no response). I unplugged and rebooted system with no success. System appears to have channels programmed for the Oklahoma area. How can I set-up unit for my area if system is "password locked"?

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