Sentry Key shows up and jeep will not turn over

[Soules3]

I have a 2004 Keep liberty sport. I did a heater core change out. Once everything was back together I attempted to start it, but it will not crank. A key slashed out is showing up on the dash (Sentry Key?) Is that why I am having issues? If so, is there any way to reprogram? Also the power locks won't work, the power windows won't work and the stereo won't work

 

[Ksat]

The light you're seeing on the dash sounds like the immobilizer, You may want to check you plugged all the electrical connectors back in, especially around the ignition cylinder. You may also may want to try using a different key, if you have one.