Need a little help

I just installed a JVC KD-S5050 CD player in my truck and all it does when I go to turn the key the display says "see ya" and turns off right away. I tried to change all fuses, tried to reset the unit and it still doesn't work. When I hit the display button, it shows the clock for about 10 seconds and then shuts off again. How do I fix this?

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