As Hal said, pull the ACS out of the carrier, and put the power cord right into the back of it.
Test with the first 5 lines that are still on the ACS.

If OK, put the ACS into the carrier, pull the other modules, and retest the first 5 line. Then add one module at a time. Even swap positions of the 308 and the 012 (which won't affect programming, the extension numbers and line numbers will remain the same.)