Audio Systems: 1992 Chevy Delco 3pc radio acting strange, chevy truck, radio head

Question
My 92 Chevy truck has a 3pc radio. Head unit, CDM, and EQ.  The problem is I had to remove the CDM for temporary access to something else.  When it was reinstalled I now have no radio.  The time shows 1:00 and the radio is stuck on 87.1FM.  Nothing will change or reset.  I am sure the wires were plugged in correctly.  I think... Also since the radio wont work correctly the EQ will not light up.  I am looking for an sort of direction you can point me in.

Answer
under the dash there is a rcu tunner amplifier box  unplug the power for a couple of minutes also make sure that it is ground to the chasis  
the radio needs to see  power after a couple of minutes off to work again make sure the other plugs are plug in also the last pin of the plug sometimes it bends inside hart to find use a small flash light to see the pins
good luck