My 2008 chevy equinox will not start.

What is your question?

I put in a brand new starter, the battery is good, and it just ran the other day. Now all of a sudden it wont start. I can turn the key into the electrical system on position and the lights and gauges turn on. Then when I go to turn it over the gauges go all the way to the right then back to the left and they go black.