amp powered but no sound

A quick look at the setup of my system.  I have a Premier CD player about 9+ years old, Boston acoustic mid's and high's driven by a Kicker KX800.4.  12" Eclipse sub, driven by a FS BD1000.1.  This is in my 97 Chevy Lumina.  I recently swapped out my no-namer 4 channel amp for my kicker mentioned above.  when I had the no-namer in my car everything worked fine.  I had to run 4 gauge power and ground for the kicker.  I had problems earlier with the kicker amp before I ran the 4 gauge wire.  I would get a random static in my speakers and the amp would pop off and on.  After running the 4 gauge wire I was still getting the static with smaller pops from the amp that sounded like a cd skipping.  That wasn't due to a CD since I was using my Ipod.  I was coming home the other day and it started popping off and on again and then nothing.  The amp has power but no sound. Also there is always a delay before the music would start playing.  I could hear my sub working before my mids and highs.  Is that just something to do with my amp? Like a system check or something, or is it wired wrong?  I ran RCA's to my Kicker amp that went straight to my Ipod to see if I could get any sound, but I got nothing.  Please let me know your thoughts.