The engine starts, but none of the interior electronics work, including power windows, locks, dash lights, and gauges. The gearshift won't change out of Park, and the radio won't turn on. The fuses work.
It sounds as though the electrical part of the ignition switch is loosing contact internally; this will need to be verified, and the switch will possibly need to be replaced. I recommend you have a mechanic, like one from YourMechanic, inspect your ignition switch, and replace it, if necessary.
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