check the voltage at the speaker outputs, maybe a speaker wire fell out? you could also just check resistance at the speaker terminals too.
also make sure your master/slave switch is on master.. i went through about 30 mins of trouble shooting with one of my addictive 500.1s. finally just threw in a different one i had and a few days later notices i still had the one on slave from when i had the strapped.
you can also unplug the rca from the amps a measure voltage on that to see if signal is going to the amp.
the the last easy thing would be make sure the sub setting on your deck isnt turned off.
edit.. you need more patience.. less than a 15 min bump..