No power output from the amplifier...

Hi, I have a T3-500D Ultimate amp and all of the leds are on, the voltage indicator along with the temperature and the power protect lights are on. However the temp indicator is just displaying EEE and like I stated above, no power to the subs are being pumped out. Any idea why? We have hooked it up to other subs, head units, capacitors etc and still nothing. All the fuses check out, ground, power, and remote all check out and I have come down to the assumption that it is something internal. Any helpwould be appreciated,

Thanks in advanced!